OSN1500 System Description

OptiX OSN 1500 Technical Manual - System Description Contents

Huawei Technologies Proprietary

i

Contents

1 Network Application 1-1

2 Functions 2-1

2.1 Capacity 2-1 2.1.1 Cross-Connect Capacity 2-1 2.1.2 Access Capacity of Slots 2-2 2.1.3 Service Access Capability 2-3

2.2 Interface 2-3 2.2.1 Service Interface 2-3 2.2.2 Administration and Auxiliary Interface 2-4

2.3 Built-in WDM Technology 2-4 2.4 110 V/220 V Power Supply 2-5 2.5 Clock 2-5 2.6 Protection 2-5

2.6.1 Equipment Level Protection 2-5 2.6.2 Network Level Protection 2-6

2.7 NM Information Interworking 2-7 2.7.1 Interworking at Physical Layer 2-7 2.7.2 Interworking at Network Layer 2-7

3 Hardware 3-1

3.1 Cabinet 3-1 3.2 Subrack 3-2

4 Boards 4-1

4.1 Type 4-1 4.2 Slot 4-3

4.2.1 OptiX OSN 1500 A 4-3



ii

4.2.2 OptiX OSN 1500 B 4-6

5 Software Structure 5-1

5.1 Overview 5-1 5.2 NE Software 5-2 5.3 Board Software 5-3 5.4 NM System 5-3

6 Data Features 6-1

6.1 Ethernet 6-1 6.1.1 Function 6-1 6.1.2 Application 6-4 6.1.3 Protection 6-7

6.2 RPR Features 6-9 6.2.1 Function 6-9 6.2.2 Application 6-13 6.2.3 Protection 6-15

6.3 ATM Features 6-17 6.3.1 Functions 6-17 6.3.2 Application 6-18 6.3.3 Protection 6-20

6.4 SAN Features 6-21

7 Protection 7-1

7.1 Equipment Level Protection 7-1 7.1.1 TPS Protection for Service Processing Boards 7-1 7.1.2 1+1 Hot Backup for the Cross-Connect Unit and Timing Unit 7-2 7.1.3 1+1 Hot Backup for the SCC Unit 7-2 7.1.4 1+1 Hot Backup for the Power Input Unit 7-2 7.1.5 1:N Protection for the +3.3 V Board Power Supply 7-2 7.1.6 Abnormality-Specific Service Protection 7-2

7.2 Network Level Protection 7-3 7.2.1 Basic Networking Modes 7-3 7.2.2 SDH Trail Protection 7-4 7.2.3 SNCP 7-4 7.2.4 Protection for Interworking Service on Rings 7-4 7.2.5 Fiber-shared Virtual Trail Protection 7-4 7.2.6 MS-Shared Optical Path Protection 7-6



iii

8 OAM 8-1

8.1 Operation and Maintenance 8-1 8.2 Administration 8-2

9 Technical Specifications 9-1

9.1 Optical Interface Performance 9-1 9.1.1 SDH Optical Interface 9-1 9.1.2 Ethernet Optical Interface 9-3 9.1.3 ATM Optical Interface 9-4

9.2 Electrical Interface Performance 9-5 9.3 Clock Performance 9-5

9.3.1 Clock Interface Type 9-5 9.3.2 Timing and Synchronization Performance 9-5

9.4 Transmission Performance 9-6 9.5 Power Supply Parameters 9-6 9.6 Power Consumption and Weight of Boards 9-6 9.7 Electromagnetic Compatibility 9-7 9.8 Environmental Index 9-9 9.9 Environment Requirement 9-9

9.9.1 Environment for Storage 9-9 9.9.2 Environment for Transportation 9-11 9.9.3 Environment for Operation 9-13

OptiX OSN 1500 Technical Manual - System Description Figures


iv

Figures

Figure 1-1 Appearance of the OptiX OSN 1500 A 1-2 Figure 1-2 Appearance of the OptiX OSN 1500 B 1-2 Figure 1-3 Application of the OptiX OSN 1500 in the network 1-3 Figure 2-1 Access capacity of slots in OptiX OSN 1500 A 2-2 Figure 2-2 Access capacity of slots in OptiX OSN 1500 B 2-2 Figure 2-3 NM information transparently transmitted by third party equipment 2-7 Figure 2-4 The NM information of the third party equipment is transparently transmitted 2-7 Figure 2-5 The NM information transparently transmitted by the third party equipment 2-8 Figure 2-6 The NM information of the third party equipment is transparently transmitted 2-8 Figure 2-7 Transparent transmission of NM information by the third party equipment (OSI) 2-9 Figure 2-8 Transparent transmission of NM information of third party equipment (OSI) 2-9 Figure 3-1 OptiX OSN 1500 A subrack 3-2 Figure 3-2 OptiX OSN 1500 B subrack 3-2 Figure 4-1 System architecture of the OptiX OSN 1500 4-1 Figure 4-2 Slot distribution of OptiX OSN 1500 A 4-3 Figure 4-3 Slot layout before division of the slots 4-7 Figure 4-4 Slot layout after division of the slots 4-7 Figure 5-1 Software system structure of the OptiX OSN 1500 5-1 Figure 5-2 Hierarchical structure of OSP software 5-2 Figure 6-1 The EPL service 6-4 Figure 6-2 The EVPL service with VLAN tag 6-5 Figure 6-3 The EVPL service with MPLS label 6-5 Figure 6-4 Layer 2 switching of Ethernet service 6-6 Figure 6-5 Application of EVPLAN service 6-7 Figure 6-6 LCAS adjusts bandwidth dynamically 6-8 Figure 6-7 LCAS protects the virtual concatenation group 6-8

OptiX OSN 1500 Technical Manual - System Description Figures


v

Figure 6-8 Flow control at the Ethernet side 6-9 Figure 6-9 RPR ring 6-10 Figure 6-10 Spatial reuse 6-12 Figure 6-11 Fairness algorithm when the weight is 1 6-13 Figure 6-12 Fairness algorithm when the weights are different 6-13 Figure 6-13 EVPL accessing, forwarding and stripping 6-14 Figure 6-14 EVPL service convergence 6-14 Figure 6-15 EVPLAN service 6-15 Figure 6-16 Wrap protection 6-16 Figure 6-17 Steering protection 6-16 Figure 6-18 Application of Band exclusive ATM Services 6-19 Figure 6-19 VP/VC-Ring 6-20 Figure 7-1 Fiber-shared virtual trail protection 7-5 Figure 7-2 MS-shared optical path protection 7-6 Figure 7-3 Two lower-speed lines share one higher-speed line 7-6 Figure 7-4 Sharing protection under the lines with the same speed 7-6

OptiX OSN 1500 Technical Manual - System Description Tables


vi

Tables

Table 2-1 Cross-connect capacity 2-1 Table 2-2 Maximum service access capacity 2-3 Table 2-3 The service interfaces 2-3 Table 2-4 The administration and auxiliary interfaces 2-4 Table 2-5 Equipment level protection 2-5 Table 2-6 The maximum number of MSP rings supported by the OptiX OSN 1500 2-6 Table 3-1 Technical parameters of the ETSI cabinet 3-1 Table 4-1 Constituent boards and functions of units 4-2 Table 4-2 Paired slots 4-3 Table 4-3 Board of OptiX OSN 1500 A 4-3 Table 4-4 Paired slots of OptiX OSN 1500 B 4-6 Table 4-5 Boards of OptiX OSN 1500 B 4-7 Table 4-6 Relation of slots and interface board 4-10 Table 6-1 The Ethernet boards function list (first) 6-1 Table 6-2 The Ethernet boards function list (second ) 6-2 Table 6-3 EMR0 and EGR2 function list 6-10 Table 6-4 RPR service class 6-11 Table 6-5 Functions of the two ATM boards 6-17 Table 6-6 Supportable ATM service and traffic types of the OptiX OSN 1500 6-18 Table 6-7 Classification of ATM protection 6-20 Table 7-1 Basic networking modes 7-3 Table 9-1 Performance of the STM-1 optical interface 9-1 Table 9-2 Performance of the STM-4 optical interface 9-2 Table 9-3 Performance of the STM-16 optical interface 9-2 Table 9-4 Performances of the STM-16 (FEC) optical interface of the OptiX OSN 1500 9-3 Table 9-5 Specifications of Ethernet optical interface 9-3

OptiX OSN 1500 Technical Manual - System Description Tables


vii

Table 9-6 Specifications of ATM optical interface 9-4 Table 9-7 Performance of the PDH electrical interface 9-5 Table 9-8 Clock features 9-5 Table 9-9 Timing and synchronization performance 9-5 Table 9-10 Transmission performance 9-6 Table 9-11 Power supply parameters of the OptiX OSN 1500 9-6 Table 9-12 Power consumption of boards 9-6 Table 9-13 EMC test indices 9-7 Table 9-14 Environmental indices 9-9 Table 9-15 Climate environment for storage 9-9 Table 9-16 Density for mechanical active substances 9-10 Table 9-17 Density for chemical active substances 9-10 Table 9-18 Requirements for mechanical stress 9-11 Table 9-19 Climate environment for transportation 9-11 Table 9-20 Density for mechanical active substances 9-12 Table 9-21 Density for chemical active substances 9-12 Table 9-22 Requirements for mechanical stress 9-12 Table 9-23 Requirements for temperature and humidity 9-13 Table 9-24 Other climate requirements 9-13 Table 9-25 Density for mechanical active substances 9-14 Table 9-26 Density for chemical active substances 9-14 Table 9-27 Requirements for mechanical stress 9-14

OptiX OSN 1500 Technical Manual - System Description 1 Network Application


1-1

1 Network Application This chapter describes application of the OptiX OSN 1500 in the transmission network. The OptiX OSN 1500 is new generation equipment developed by Huawei Technologies Co., Ltd (hereinafter referred to as Huawei). It integrates the following technologies. Synchronous digital hierarchy (SDH) Wavelength division multiplexing (WDM) Ethernet Asynchronous transfer mode (ATM) Plesiochronous digital hierarchy (PDH) There are two types of OptiX OSN 1500 systems. Figure 1-1 shows OptiX OSN 1500 A and Figure 1-2 shows OptiX OSN 1500 B. Besides the appearance, OptiX OSN 1500 A and OptiX OSN 1500 B also differ in the access capacity.

Note: This manual gives notes for features special to the OptiX OSN 1500 A or the OptiX OSN 1500 B. Features not noted special to which product apply to both products.



1-2

Figure 1-1 Appearance of the OptiX OSN 1500 A

Figure 1-2 Appearance of the OptiX OSN 1500 B

Figure 1-3 shows the OptiX OSN 1500 is applied in a transmission network. The OptiX OSN 1500 is mainly used at the access layer of the MAN. It can interconnect with the following equipments. OptiX OSN 9500 OptiX OSN 7500 OptiX OSN 3500 OptiX OSN 2500



1-3

OptiX OSN 9500

Backbone layer

OptiX OSN 3500 OptiX OSN 7500

OptiX OSN 3500OptiX OSN 2500

OptiX OSN 2500OptiX OSN 1500

Convergence layer

Access layer

GSM/CDMA/WCDMA Ethernet SANPSTN ATM. . .

Figure 1-3 Application of the OptiX OSN 1500 in the network

OptiX OSN 1500 Technical Manual - System Description 2 Functions


2-1

2 Functions This chapter introduces the functions of the OptiX OSN 1500 A and OptiX OSN 1500 B as follows. Capacity Interface Built-in WDM Technology 110 V/220 V Power Supply Clock Protection NM Information Interworking

2.1 Capacity

2.1.1 Cross-Connect Capacity

Table 2-1 shows the cross-connect capacity of the OptiX OSN 1500. Table 2-1 Cross-connect capacity

Cross-connect and timing board

Higher order cross-connect capacity

Lower order cross-connect capacity

Access capacity

SSQ1CXL1 20 Gbit/s (128 x 128 VC-4) 5 Gbit/s (32 x 32 VC-4) 15 Gbit/s (96 x 96 VC-4) SSQ1CXL4 20 Gbit/s (128 x 128 VC-4) 5 Gbit/s (32 x 32 VC-4) 15 Gbit/s (96 x 96 VC-4) SSQ1CXL16 20 Gbit/s (128 x 128 VC-4) 5 Gbit/s (32 x 32 VC-4) 15 Gbit/s (96 x 96 VC-4) SSQ2CXL1 20 Gbit/s (128 x 128 VC-4) 20 Gbit/s (128 x 128 VC-4) 15 Gbit/s (96 x 96 VC-4) SSQ2CXL4 20 Gbit/s (128 x 128 VC-4) 20 Gbit/s (128 x 128 VC-4) 15 Gbit/s (96 x 96 VC-4) SSQ2CXL16 20 Gbit/s (128 x 128 VC-4) 20 Gbit/s (128 x 128 VC-4) 15 Gbit/s (96 x 96 VC-4)



2-2

2.1.2 Access Capacity of Slots

Figure 2-1 illustrates the access capacity of each slot in the OptiX OSN 1500 A and Figure 2-2 illustrates that of slots in the OptiX OSN 1500 B. Slot 12 and slot 13 can be divided into four half-slots in OptiX OSN 1500 A. Slot 12 can be divided into two half-slots: slot 2 and slot 12. Slot 13 can be divided into two half-slots: slot 3 and slot 13. The access capacity of the original slot 12 or 13 is 2.5 Gbit/s. The access capacity of each of the four half-slots is 1.25 Gbit/s.

Slot 11, slot 12 and slot 13 can be divided into six half-slots in OptiX OSN 1500 B. Slot 11 can be divided into two half-slots: slot 1 and slot 11. Slot 12 can be divided into two half-slots: slot 2 and slot 12. Slot 13 can be divided into two half-slots: slot 3 and slot 13. The access capacity of the original slot 11, slot 12 or slot 13 is 2.5 Gbit/s The capacity of each of the six half-slots is 1.25 Gbit/s

XCS A XCS B

Slot20

Slot 1 Slot 11 Slot 6

Slot 2/12 Slot 7

Slot 3/13 Slot 8

Slot 4 Slot 9

Slot 5 Slot 102.5Gbit/s

2.5Gbit/s

2.5Gbit/s

2.5Gbit/s

1.25Gbit/s

1.25Gbit/s

1.25Gbit/s

1.25Gbit/s

Figure 2-1 Access capacity of slots in OptiX OSN 1500 A

Slot 14 Slot 18 PIU

Slot 15

Slot 16

Slot 17

Slot 20

FAN

Slot 1/11

Slot 2/12

Slot 3/13

Slot 4

Slot 19 PIU

Slot 6

Slot 7

Slot 8

Slot 9

Slot 10 AUX Slot 5

2.5Gbit/s

2.5Gbit/s

2.5Gbit/s

2.5Gbit/s

2.5Gbit/s

622Mbit/s

622Mbit/s

622Mbit/s

622Mbit/s

Figure 2-2 Access capacity of slots in OptiX OSN 1500 B



2-3

2.1.3 Service Access Capability

The OptiX OSN 1500 provides different service access capacities depending on the type and number of boards. Table 2-2 lists the service access capacities of OptiX OSN 1500 A and OptiX OSN 1500 B. Table 2-2 Maximum service access capacity

Maximum access capacity Service type

OSN 1500 A OSN 1500 B

STM-16 standard or concatenated service 4 5

STM-4 standard or concatenated service 18 18

STM-1 standard service 42 54

STM-1 (electrical) service 4 18 E3/T3 service 6 12

E1 service 64 128

Fast Ethernet (FE) service 16 20 Gigabit Ethernet (GE) service 4 6 RPR FE service 8 28

RPR GE service 2 3

STM-1 ATM service 8 12

STM-4 ATM service 2 3

2.2 Interface

2.2.1 Service Interface

The service interfaces of the OptiX OSN 1500 are shown in Table 2-4. Table 2-3 The service interfaces

Interface

Description

SDH service interface STM-1 electrical interface STM-1 optical interfaces: I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 STM-4 optical interfaces: I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 STM-16 optical interfaces: I-16, S-16.1, L-16.1, L-16.2, L-16.2Je, V-16.2Je, U-16.2Je(CXL16 can not provide L-16.2Je, V-16.2Je, U-16.2Je interface) STM-16 optical interface with FEC

PDH service interface E1, T1, E3, DS3 and E4 electrical interfaces

Ethernet service interface

10/100Base-TX, 100Base-FX, 1000Base-SX, 1000Base-LX, 1000Base-ZX, 1000Base-TX



2-4

Interface

Description

ATM service interface STM-1 optical interface: Ie-1, S-1.1, L-1.1 STM-4 optical interface: S-4.1, L-4.1 STM-1 optical interface: support IMA STM-4 optical interface: support IMA

Storage area network (SAN) service interface

FC50, FC100/FICON, FC200, ESCON service optical interface

Video service interface

DVB-ASI service optical interface

2.2.2 Administration and Auxiliary Interface

The administration and auxiliary interfaces of the OptiX OSN 1500 are shown in Table 2-4. Table 2-4 The administration and auxiliary interfaces

Interface

Description

Clock interface two 75 ohm or 120 ohm external clock interfaces (2048 kbit/s or 2048 kHz)

Alarm interface Three inputs and one output Boolean value interface

Administration interface One RS-232 remote maintenance interface (OAM) Four broadcast data interfaces (Serial 14) One Ethernet network management (NM) interface (ETH) One administration serial interface (F&f)

Orderwire interface One orderwire phone interface (PHONE)

2.3 Built-in WDM Technology

The OptiX OSN 1500 provides dual optical add/drop multiplex board MR2A/MR2B/MR2C and arbitrary rate wavelength conversion board LWX to realize built-in WDM technology. Below are their characteristics. The MR2A/MR2B/MR2C can add or drop any two adjacent standard wavelengths

(with spacing being 100 GHz) in compliance with ITU-T Recommendation G.694.1. The operating wavelength range is 1535.82 nm1560.61 nm.

The MR2A/MR2B/MR2C can be used as an OTM to add/drop two wavelengths and concatenation of two MR2A/MR2Cs can function as an OTM to add/drop four wavelengths.

The MR2A/MR2B/MR2C can work with the LWX to function as an OADM to add/drop two wavelengths.

The LWX supports the conversion between client signalling wavelength and ITU-T G.694.1 compliant standard wavelength and supports transparent transmission of signals.



2-5

Provide 3R function to added/dropped client signals (10 Mbit/s2.7 Gbit/s), implement clock recovery and monitor the transmission rate.

Provide two types of LWX board, one is single-fed single receiving and the other is dual-fed selective receiving.

The dual-fed selective receiving LWX board supports intra-board protection with protection switching time less than 50ms.

The single-fed single receiving LWX board supports 1+1 inter-board protection with protection switching time less than 50ms.

2.4 110 V/220 V Power Supply

The OptiX OSN 1500 supports the 110 V/220 V power supply through uninterrupted power module (UPM). The UPM is used to convert 110 V/220 V AC into 48 V DC, to provide power supply for the OptiX OSN 1500. A UPM consists of power boxes and storage batteries. The output power of each UPM is 2 x 270 W. The power box measures 438 mm (W) x 240 mm (D) x 44 mm (H). The OptiX OSN 1500 needs two power boxes. The storage battery of the OptiX OSN 1500 consists of four 12 V-40 Ah storage batteries. The dimensions of each battery are 197 mm x 165 mm x 170 mm. If the AC fails, the storage battery can sustain four hours.

2.5 Clock

The OptiX OSN 1500 supports clock functions below. Supports SSM(Synchronization Status Message) protection. Supports tributary retiming. Support two 75 ohm external clock interfaces (2048 kbit/s or 2048 kHz). Support two 120 ohm external clock interfaces (2048 kbit/s or 2048 kHz). When tracing tributary clock sources, the network element can only tracing the first

port or the fourth port of PD3 board. 2.6 Protection

2.6.1 Equipment Level Protection

Table 2-5 shows the equipment level protection provided by the OptiX OSN 1500. Table 2-5 Equipment level protection

Protection scheme Items protected

OptiX OSN 1500 A OptiX OSN 1500 B

E1 processing board 1:1 tributary protection switching (TPS)

1:N (N2) TPS

E3/T3 processing board - 1:1 TPS

E4/STM-1 processing board - 1:1 TPS

Ethernet processing board - 1:1 TPS

Cross-connect and timing 1+1 hot backup protection 1+1 hot backup protection



2-6

board

SCC board 1+1 hot backup protection 1+1 hot backup protection

48 V power interface board 1+1 hot backup protection 1+1 hot backup protection

+3.3 V board power supply 1:N centralized backup protection

1:N centralized backup protection

2.6.2 Network Level Protection

The OptiX OSN 1500 supports the following protection. Four-fibre multiplex section protection (MSP) ring Two-fibre MSP ring Linear MSP Fibre-shared virtual trail protection Sub-network connection protection (SNCP) Table 2-6 shows the maximum number of MSP rings supported by the OptiX OSN 1500. At one time, the OptiX OSN 1500 only supports one protection scheme in the following table. Table 2-6 The maximum number of MSP rings supported by the OptiX OSN 1500

Protection scheme Max. number of MSP rings supported

STM-16 four-fiber MSP ring 1

STM-16 two-fiber MSP ring 2

STM-4 four-fiber MSP ring 3

STM-4 two-fiber MSP ring 7

The OptiX OSN 1500 supports the function of squelching misconnected VC-4 traffic. Each protection timeslot in multiplex section protection ring is shared by traffic from different segments or occupied by extra traffic. With no extra traffic in the ring, and under the situation that a certain node is isolated because of multiple points failure, traffic from different segments of the same timeslot may contend for the same protection channel time slot. This brings misconnection of traffic. With extra traffic in the ring, and even under the situation of a single nodes failure, traffic from working channel may contend for the timeslot of protection channel carrying extra traffic. This also brings misconnection. To prevent misconnection, every node of the OptiX OSN 1500 has a detailed connection table. Every node knows the source point and endpoint of each AU-4. Such information helps APS protocol to tell possible misconnections in advance. Traffic with the potentiality of misconnection is discarded through inserting AU_AIS.



2-7

2.7 NM Information Interworking

2.7.1 Interworking at Physical Layer

1. NM Information Transparently Transmitted by a Third Party Equipment The DCC consists of two parts: D1D3 bytes, forming a 192 kbit/s channel. D4D12 bytes, forming a 576 kbit/s channel. Currently, only the D1D3 bytes are used. The D4D12 bytes are reserved for higher management requirements. When there is a third party equipment between the OptiX OSN 1500 systems, the bytes D4D12 will be used by the third party equipment to transmit the NM information, as shown in Figure 2-3.

Third partyequipment


D1-D3,E1, E2

D1-D3,E1, E2

Transparenttransmission

Figure 2-3 NM information transparently transmitted by third party equipment

2. The NM Information of the Third Party Equipment is Transparently Transmitted The NM information of the third party equipment can be transmitted by bytes D4D12 of the OptiX OSN 1500, as shown in Figure 2-4.



D1-D3,E1, E2

D1-D3,E1, E2Transparent

transmission

Figure 2-4 The NM information of the third party equipment is transparently transmitted

2.7.2 Interworking at Network Layer



2-8

1. IP Over DCC The scheme of IP over DCC uses the network layer protocol for NM information transmission. IP over DCC has two networking topologies as shown in Figure 2-5 and Figure 2-6.



IP over DCC

Figure 2-5 The NM information transparently transmitted by the third party equipment



IP over DCC



Figure 2-6 The NM information of the third party equipment is transparently transmitted

2. OSI over DCC(TP4) OSI over DCC adopts standard OSI protocols (also called TP4) to transmit NM information at network layer. For OSI over DCC, there are two networking modes. One is the NM information of the OptiX OSN 1500 is transparently transmitted by

the third party equipment through OSI over DCC, as shown in Figure 2-7. The other is the NM information of the third party equipment is transparently



2-9

transmitted by the OptiX OSN 1500, as shown in Figure 2-8.



OSI Over DCC

OSI protocolstack

OSI protoclstack

OSI protocolstack

Figure 2-7 Transparent transmission of NM information by the third party equipment (OSI)



OSI Over DCC



OSI protocolstack

OSI protocolstack

OSI protocolstack

Figure 2-8 Transparent transmission of NM information of third party equipment (OSI)

OptiX OSN 1500 Technical Manual - System Description 3 Hardware


3-1

3 Hardware This chapter describes the hardware structure of the OptiX OSN 1500, including the appearance and parameters of the cabinet, and the subrack structure. It covers: Cabinet Subrack

3.1 Cabinet

The OptiX OSN 1500 can be installed in the ETSI cabinet or a 19 inch standard cabinet. It can also be installed on the desk or on the wall. Table 3-1 shows the technical parameters of the ETSI cabinet. Figure 3-1 shows how the ETSI cabinet. Table 3-1 Technical parameters of the ETSI cabinet

Size (mm)

Weight (kg)

600 (W) x 300 (D) x 2000 (H) 55 600 (W) x 600 (D) x 2000 (H) 79 600 (W) x 300 (D) x 2200 (H) 60 600 (W) x 600 (D) x 2200 (H) 84 600 (W) x 300 (D) x 2600 (H) 70 600 (W) x 600 (D) x 2600 (H) 94

Table 3-2 Technical parameters of the 19 inch standard cabinet Size (mm) Weight (kg)

600 (W) x 600 (D) x 1800 (H) 90 600 (W) x 600 (D) x 2200 (H) 110

OptiX OSN 1500 Technical Manual - System Description 3 Hardware


3-2

3.2 Subrack

The OptiX OSN 1500 A measures 131 mm (H) x 444 mm (W) x 262 mm (D), as shown in Figure 3-1. The OptiX OSN 1500 B measures 221 mm (H) x 444 mm (W) x 262 mm (D), as shown in Figure 3-2.

1

2

4

5

6

3

1. Fan area 2. Process board area 3. PIU area 4. Process board area 5. Cabling guide 6. Ear bracket Figure 3-1 OptiX OSN 1500 A subrack

3

4

5

6

7

1

2

1. Interface board area 2. PIU area 3. Fan area 4. Process board area 5. Process board area 6. Cabling guide 7. Ear bracket Figure 3-2 OptiX OSN 1500 B subrack

OptiX OSN 1500 Technical Manual - System Description 4 Boards


4-1

4 Boards This chapter introduces the boards of the OptiX OSN 1500, as well as their slots. It comprises two sections: Type Slot

4.1 Type

The OptiX OSN 1500 consists of SDH interface unit, PDH/Ethernet/ATM interface unit, SDH cross-connect matrix unit , synchronous timing unit, SCC unit, overhead processing unit and auxiliary interface unit. Figure 4-1 shows the system architecture of the OptiX OSN 1500, while Table 4-1 shows its boards and functions of each unit.

PDH/Ethern

et/ATM

Interfa

ce U

nit

STM-N Optical Signal

PDH SignalEthernet Signal

ATM Signal

Cro

ss C

onne

ct

Matrix

SDH Inte

rface

Unit

Ove

rhead

Pro

cessing

Unit

Synch

ronous

timing

Unit

Auxilia

ry

Interfa

ce U

nit

SCC U

nit

Figure 4-1 System architecture of the OptiX OSN 1500



4-2

Table 4-1 Constituent boards and functions of units Unit OptiX OSN 1500 A OptiX OSN 1500 B

Processing board SF16, SL16, SLQ4, SLD4, SL4, SLQ1, SL1, SEP1, SLT1, R1SL4, R1SLD4, R1SLQ1, R1SL1

SF16, SL16, SLQ4, SLD4, SL4, SLQ1, SL1, SEP1, SLT1, R1SL4, R1SLD4, R1SLQ1, R1SL1

Interface board - EU04, EU08, OU08

SDH interface unit

Protection switching board - TSB8

Processing board PD1, PL1 PD1, SPQ4, PD3, PL3, PQ1, PQM

PDH interface unit

Interface board L12S, L75S MU04, D34S, D75S, D12S, D12B

Processing board EGS2, EGT2, EFS4, EFT4, EFT8

EGS2, EGT2, EFS0, EFS4, EFT4, EFT8

Ethernet interface unit

Interface board - ETF8, EFF8, ETS8

Processing board EMR0, EGR2 EMR0 ,EGR2 Resilient packet ring unit Interface board - ETF8 ,EFF8

ATM interface unit ADL4, ADQ1, IDL4, IDQ1 ADL4, ADQ1, IDL4, IDQ1

SAN interface unit MST4 MST4

MR2A, MR2B MR2A, MR2B, MR2C WDM unit

LWX LWX

Line, cross-connect, timing and SCC unit CXL1, CXL4, CXL16 CXL1, CXL4, CXL16

Orderwire unit EOW EOW

PIU PIU Power input unit

UPM(Uninterrupted Power Model) UPM

System auxiliary process unit AUX AUX

Fan unit FAN FAN

COA COA

BA2 BA2

Optical booster amplifier board

BPA BPA



4-3

4.2 Slot

4.2.1 OptiX OSN 1500 A

Figure 4-2 illustrates the slot distribution of the OptiX OSN 1500 A. Table 4-3 gives the board. Slot 12 can be divided into slot 2 and 12. Slot 13 can be divided into slot 3 and slot 13. Table 4-2 lists the paired slots. Table 4-2 Paired slots

Before division of the slots After division of the slots

4, 5 4, 5

6, 9 6, 9

7, 8 7, 8

2, 12

Paired slots

12, 13

3, 13

XCS A XCS B

Slot20




Slot 4 Slot 9

Slot 5 Slot 10

Figure 4-2 Slot distribution of OptiX OSN 1500 A

Table 4-3 Board of OptiX OSN 1500 A Name Description Slot Interface Connector

SL16 1 x STM-16 optical board

12, 13 I-16, S-16.1, L-16.1, L-16.2, L-16.2Je

LC

SF16 1 x STM-16 optical board

12, 13 I-16, S-16.1, L-16.1, L-16.2, L-16.2Je Support FEC

LC

SLD4 2 x STM-4 optical board

12, 13 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

LC

SLQ4 4 x STM-4 optical board

12, 13 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

LC


12, 13 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

LC

SLQ1 4 x STM-1 optical board

12, 13 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC



4-4

Name Description Slot Interface Connector

SLT1 12 x STM-1 optical board

12, 13 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC


12, 13 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC

SEP1 2 x STM-1 electrical board

12, 13 75 ohm STM-1 SMB

R1SL4 1 x STM-4 optical board

2, 3, 6, 7, 8, 9, 12, 13

I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

LC

R1SLD4 2 x STM-4 optical board

2, 3, 6, 7, 8, 9, 12, 13

I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

LC

R1SL1 1 x STM-1 optical board

2, 3, 6, 7, 8, 9, 12, 13

I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC

R1SLQ1 4 x STM-1 optical board

2, 3, 6, 7, 8, 9, 12, 13

I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC

BA2 2 x Optical Amplifier

12, 13 - LC

BPA 1 x preamplifier 12, 13 - LC

LWX Arbitrary bit rate wavelength conversion unit

12, 13 - LC

COA External amplifier 50 - -

PD1 32 x E1 processing board

2, 12 Used with L75S or L12S 120 ohm /75 ohm E1 interface

2mmHM

PL1A 16 x E1 processing board

6, 7, 8, 9 - 2mmHM

PL1B 16 x E1 processing board

6, 7, 8, 9 - 2mmHM

L75S 16 x E1 interface board

6, 7 75 ohm E1 interface 2mmHM

L12S 16 x E1 interface board

6, 7 120 ohm E interface 2mmHM

CXL 80, 81 - -

SCC 82, 83 - -

CXL1

SL1 4, 5 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC



4-5


CXL 80, 81 - -

SCC 82, 83 - -

CXL4

SL4 4, 5 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2

LC

CXL 80, 81 - -

SCC 82, 83 - -

CXL16

SL16 4, 5 I-16, S-16.1, L-16.1, L-16.2, L-16.2Je

LC

EGR2 2 x 1000 Mbit/s optical-port RPR processing board

12, 13 1000BASE-SX/LX/ZX LC

EGS2 2-port Gigabit Ethernet switching processing board


EFS4 4-port 10/100 Mbit/s fast Ethernet processing board with LAN switch

12, 13 10/100BASE-TX RJ-45

EGT2 2-port Gigabit Ethernet transparent transmission board


EFT4 4-port 10/100 Mbit/s Ethernet transparent transmission board

2, 3, 6, 7, 8, 9, 12, 13

10/100BASE-TX RJ-45


12, 13 10/100BASE-TX RJ-45

EMR0 4 x 10/100 Mbit/s electrical-port and 1 x 1000 Mbit/s optical-port RPR processing board

12, 13 10/100BASE-TX/FX, 1000BASE-SX/LX/ZX

RJ-45, LC

ADL4 1 x STM-4 ATM processing board

12, 13 S-4.1, L-4.1 LC

ADQ1 4 x STM-1 ATM processing board

12, 13 I-1, S-1.1, L-1.1 LC

IDL4 1 x STM-4 IMA processing board

12, 13 S-4.1, L-4.1 LC



4-6


IDQ1 4 x STM-1 IMA processing board

12, 13 I-1, S-1.1, L-1.1 LC

MST4 4 x multi-service (SAN, Video) transparent transmission board

12, 13 - LC

MR2A 2-channel optical add/drop multiplexing board

12, 13 - LC

MR2B 2-channel optical add/drop multiplexing board

2, 3, 6, 7, 8, 9, 12, 13

- LC

PIU Power board 1, 11 - -

EOW Orderwire board 9 - -

FAN Fan board - - -

Note: One OptiX OSN 1500 A subrack can configure one 61COA or 62COA.

4.2.2 OptiX OSN 1500 B

Figure 4-3 and Figure 4-4 illustrate the slot distribution of the OptiX OSN 1500 B. Table 4-5 gives the board-slot relation. Slot 11 can be divided into slot 1 and 11. Slot 12 can be divided into slot 2 and 12. Slot 13 can be divided into slot 3 and slot 13. Table 4-4 lists the paired slots. Table 4-4 Paired slots of OptiX OSN 1500 B

Before division of the slots After division of the slots

4, 5 4, 5

6, 9 6, 9

7, 8 7, 8

1, 11

2, 12

Paired slots

12, 13

3, 13

Figure 4-3 and Figure 4-4 shows the slot layout of the OptiX OSN 1500 B.



4-7

Slot 20

FAN Slot 4Slot 5

Slot 14

Slot 15

Slot 16Slot 17

Slot 6

Slot 7

Slot 8

Slot 9Slot 10 AUX

Slot 18

Slot 19

PIU

PIU

Slot 11

Slot 12

Slot 13

Figure 4-3 Slot layout before division of the slots

Slot 20

FAN

Slot 1

Slot 2

Slot 3

Slot 4Slot 5

Slot 11

Slot 12

Slot 13

Slot 14

Slot 15

Slot 16Slot 17

Slot 6

Slot 7

Slot 8

Slot 9Slot 10 AUX

Slot 18

Slot 19

PIU

PIU

Figure 4-4 Slot layout after division of the slots

Table 4-5 Boards of OptiX OSN 1500 B Name Description Slot Interface Connector

SL16 STM-16 optical board 11, 12, 13 I-16, S-16.1, L-16.1, L-16.2, L-16.2Je LC

SF16 STM-16 optical board 11, 12, 13 I-16, S-16.1, L-16.1, L-16.2, L-16.2Je Support FEC

LC

SLQ4 4 x STM-4 optical board 11, 12, 13 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC

SLD4 2 x STM-4 optical board 11, 12, 13 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC

SL4 1 x STM-4 optical board 11, 12, 13 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC

SLQ1 4 x STM-1 optical board 11, 12, 13 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 LC

SLT1 12 x STM-1 optical board 12, 13 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 LC



4-8


SL1 1 x STM-1 optical board 11, 12, 13 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 LC

SEP1 STM-1 processing board 11, 12, 13 75 ohm STM-1 interface SMB

SEP STM-1 processing board 12, 13 I-1, S-1.1 optical interface and 75 ohm STM-1 electrical interface

LC, SMB

R1SL4 1 x STM-4 optical board 1, 2, 3, 6, 7, 8, 9, 11, 12, 13 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC

R1SLD4 2 x STM-4 optical board 1, 2, 3, 11, 12, 13 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC

R1SL1 1 x STM-1 optical board 1, 2, 3, 6, 7, 8, 9, 11, 12, 13 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 LC

R1SLQ1 4 x STM-1 optical board 1, 2, 3, 6, 7, 8, 9, 11, 12, 13 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 LC

BA2 Optical amplifier 11, 12, 13 - LC

BPA Preamplifier 11, 12, 13 - LC

COA External amplifier 50 - -

CXL 80, 81 - -

SCC 82, 83 - - CXL1

SL1 4, 5 I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 LC

CXL 80, 81 - -

SCC 82, 83 - - CXL4

SL4 4, 5 I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC

CXL 80, 81 - -

SCC 82, 83 - - CXL16

SL16 4, 5 I-16, S-16.1, L-16.1, L-16.2, L-16.2Je LC

SPQ4 4 x E4/STM-1 processing board 12, 13 75 ohm E4/STM-1 electrical interface SMB

PD3 6 x E3/T3 processing board 12, 13 75 ohm E3/T3 electrical interface SMB

PL3 3 x E3/T3 processing board 12, 13 75 ohm E3/T3 electrical interface SMB



4-9


PQ1 63 x E1 processing board 11, 12, 13 120 ohm and 75 ohm E1 interface DB44

PQM 63 x T1/E1 processing board 11, 12, 13 120 ohm E1 interface and 100 ohm T1 interface

DB44

PD1 32 x E1 processing board 1, 2, 3, 6, 7, 8, 11, 12, 13 120 ohm and 75 ohm E1 interface DB44

EGR2 2 x 1000 Mbit/s optical-port RPR processing board 11, 12, 13 1000BASE-SX/LX/ZX -

EGS2 2-port Gigabit Ethernet switching processing board 11, 12, 13 1000BASE-SX/LX/ZX LC

EFS0 10/100 Mbit/s fast Ethernet processing board with LAN switch

12, 13 10/100BASE-TX/FX RJ-45

EFS4 4-port 10/100 Mbit/s fast Ethernet processing board with LAN switch

11, 12, 13 10/100BASE-TX RJ-45

EGT2 2-port Gigabit Ethernet transparent transmission board

11, 12, 13 1000BASE-SX/LX/ZX LC


1, 2, 3, 6, 7, 8, 9, 11, 12, 13 10/100BASE-TX RJ-45


11, 12, 13 10/100BASE-TX RJ-45

EMR0 12 x 10/100 Mbit/s electrical-port and 1 x 1000 Mbit/s optical-port RPR processing board

11, 12, 13 10/100BASE-TX/FX, 1000BASE-SX/LX/ZX RJ-45, LC

ADL4 1 x STM-4 ATM processing board 11, 12, 13 S-4.1, L-4.1 LC

ADQ1 4 x STM-1 ATM processing board 11, 12, 13 I-1, S-1.1, L-1.1 LC

IDL4 1 x STM-4 IMA processing board 11, 12, 13 S-4.1, L-4.1 LC

IDQ1 4 x STM-1 IMA processing board 11, 12, 13 I-1, S-1.1, L-1.1 LC

MST4 4 x multi-service (SAN, Video) transparent transmission board

11, 12. 13 - LC



4-10


MR2A 2-channel optical add/drop multiplexing board

11, 12, 13 - LC

MR2B 2-channel optical add/drop multiplexing board

1, 2, 3, 6, 7, 8, 9, 11, 12, 13 - LC

MR2C 2-channel optical add/drop multiplexing board 14, 15, 16, 17 - LC

LWX Arbitrary bit rate wavelength conversion unit 11, 12, 13 - LC

Note: One OptiX OSN 1500 B subrack can configure one 61COA or 62COA.

Table 4-6 Relation of slots and interface board Board Full name Slots available Interface type Used with

MU04 4 x E4/STM-1 mixed electrical interface board

Slot 14, 16 SMB SPQ4

D34S 6 x E3/DS3 PDH interface switching board

Slot 14, 16 SMB PD3 or PL3

D75S 32 x 75 ohm E1/T1 PDH interface switching board

Slot 1417 DB44 PQ1

D12S 32 x 120 ohm E1/T1 PDH interface switching board

Slot 1417 DB44 PQ1 or PQM

D12B 32 x 120 ohm E1/T1 PDH interfaces board

Slot 1417 DB44 PQ1 or PQM

TSB8 8 x PDH interface switching & bridging board

Slot 14 None PL3/PD3/SPQ4 and D34S/MU04

ETF8 8 x 10/100 Mbit/s Ethernet twisted pair interface board

Slot 14, 16 RJ-45 EFS0 and EMR0

EFF8 8 x 100 Mbit/s Ethernet optical interface board

Slot 14, 16 LC EFS0 and EMR0

OptiX OSN 1500 Technical Manual - System Description 5 Software Structure


5-1

5 Software Structure 5.1 Overview

The software system of the OptiX OSN 1500 is of modular structure, as shown in Figure 5-1. The software system include three modules: board software, NE software and NM software, respectively run on various boards, SCC board and NM computer for corresponding functions.

OSP platform

NM software

NE software Boardsoftware

Figure 5-1 Software system structure of the OptiX OSN 1500

The development platform of the NE software and board software of the OptiX OSN 1500 is the new generation OptiX software platform (OSP). The OSP provides a software structure based on modules as shown in Figure 5-2.



5-2

VOS layerUnified communication mechanism layer

Network protocol layer

System application layer

Userinterface

layer

Intelligent control layer

Standard protocol stack layer

Service control layer

Figure 5-2 Hierarchical structure of OSP software

5.2 NE Software

The NE software is used to manage, monitor and control the operation of the boards of an NE. Through the NE software, the communication unit between the NM system and boards, the NM system can control and manage NEs. According to ITU-T Recommendation M.3010, the NE software belongs to the unit management layer in the telecommunication management network, implementing the functions including NE functions, some of coordination functions and operating system functions of the network unit layer. The data communication function implements the communication between the NE and other equipment (including coordinated equipment, NM system, and other NEs). Real-time multi-task operating system The function of the real-time multi-task operating system of the OptiX OSN 1500 NE software is to manage public resources and provide support for the executive program. It can provide an executive environment unrelated to processor hardware by segregating the application from the processor. Network side (NS) module The NS module is between the communication module and equipment management module. It converts the data format between the user operation side on the application layer and the NE equipment management layer, and provides security control for the NE layer. It can be divided into three sub-modules functionally: Qx interface module, command line interface module and security management module. Equipment administration module (AM) The equipment AM is the kernel of the NE software for implementing NE management. It includes Manager and Agent. Administrator can send network management operation commands and receive events. Agent can respond to the network management operation commands sent by the network administrator, implement operations to the managed object and submit events according to status change of the managed object. The equipment AM includes configuration management module, performance management module, alarm management module and MSP switching management module. Communication module



5-3

This module fulfills the message communication function (MCF) of the functional blocks of the transmission network equipment. Through the hardware interface provided by the SCC board, the communication module transmits the OAM&P information and exchanges management information between the NM system and NEs, and between NEs themselves. It consists of network communication module, serial communication module and ECC communication module. Database management module This module is an organic component of the NE software, composed of database and management system. Database comprises several sub databases, including network database, alarm database, performance database and equipment database. The management system manages and accesses the data in the database.

5.3 Board Software

The board software runs on each board, managing, monitoring and controlling the operation of the board. It receives the command issued from the NE software and reports the board status to the NE software through performance and alarm events. Its specific functions include: alarm management, performance management, configuration management and communication management and so on. It can directly control the functional circuits in corresponding boards and implement ITU-T compliant specific functions of the NE. The board software can be classified into the following types: line software, cross-connect software, clock software and orderwire software.

5.4 NM System

The NM system implements a unified management over the optical transmission network, and maintains all ION, SDH, Metro, DWDM NE equipment in the network. In compliance with ITU-T Recommendation, it is a network management system integrating standard management information model and object-oriented management technology. It exchanges information with NE software through the communication module to implement monitoring and management over the network equipment. The NM software runs on a workstation or PC, managing the equipment and the transmission network. It enables the user to operate, maintain and manage the transmission equipment. The management functions of the NM software include: Alarm management: Collect, prompt, filter, browse, acknowledge, check, clear, and

statistics in real time; fulfill alarm insertion, alarm correlation analysis and fault diagnosis.

Performance management: Set performance monitoring; browse, analyze and print performance data; forecast medium-term and long-term performance; and reset performance register.

Configuration management: Configure and manage interfaces, clocks, services, trails, subnets and time.

Security management: NM user management, NE user management, NE login management, NE login lockout, NE setting lockout and local craft terminal (LCT) access control of the equipment.

Maintenance management: Provide loopback, board resetting, board temperature



5-4

threshold setting, automatic laser shutdown (ALS) and optical fiber power detection, and collect equipment data to help the maintenance personnel in troubleshooting.

OptiX OSN 1500 Technical Manual - System Description 6 Data Features


6-1

6 Data Features This chapter introduces the data features provided by the OptiX OSN 1500. It covers: Ethernet RPR ATM

6.1 Ethernet

This section introduces the Ethernet features of the OptiX OSN 1500 in terms of function, application and protection.

6.1.1 Function

The OptiX OSN 1500 provides the Ethernet boards EFT4, EFS4, EFS0, EGS2 and EGT2 to meet different Ethernet service requirements. Table 6-1 lists the basic functions of these boards. Table 6-1 The Ethernet boards function list (first)

Function EFS4 EFS0 EGS2

Interface 4 FE 8 FE 2 GE

Service frame format Ethernet II, IEEE 802.3, IEEE 802.1QTAG

JUMBO frame Supported, 9600 bytes

Maximum uplink bandwidth

4 VC-4 8 VC-4 16 VC-4

Mapping mode VC-12,VC-3, VC-12-Xv,VC-3-Xv

VC-12,VC-3,VC-12-Xv,VC-3-Xv

VC-12,VC-3,VC-12-Xv,VC-3-Xv

VC TRUNK number 12 24 48

Ethernet private line (EPL)

Supported Supported Supported



6-2

Function EFS4 EFS0 EGS2

Ethernet virtual private line (EVPL)


Ethernet private LAN (EPLAN)


Ethernet virtual private LAN (EVPLAN)


MPLS Support MartiniOE, MartiniOP and stack VLAN

Support MartiniOE, MartiniOP and stack VLAN

Support MartiniOE, MartiniOP and stack VLAN

VLAN IEEE 802.1q/p IEEE 802.1q/p IEEE 802.1q/p

Spanning tree Support STP(Spanning Tree Protocol) and RSTP(Rapid Spanning Tree Protocol)

Support STP and RSTP

Support STP and RSTP

Multicast (IGMP Snooping)


Encapsulation Generic framing procedure (GFP), compliant with ITU-T G.7041.

LCAS Supported, compliant with ITU-T 7042.

CAR Based on port or port + VLAN, with the granularity as 64 kbit/s.

Link stat pass through (LPT)


Flow control Supported, compliant with IEEE802.3X.

Supported, compliant with IEEE802.3X.

Supported, compliant with IEEE802.3X.

Test frame Supported Supported Supported

Ethernet performance monitoring


Table 6-2 The Ethernet boards function list (second ) Function EGT2 EFT8 EFT4

Interface 2 GE 8FE 4FE

Service frame format Ethernet II, IEEE 802.3, IEEE 802.1QTAG

Ethernet II, IEEE 802.3, IEEE 802.1QTAG

Ethernet II, IEEE 802.3, IEEE 802.1QTAG



6-3

Function EGT2 EFT8 EFT4

JUMBO frame Supported, 9600 bytes supported supported


16 VC-4 8 VC-4 4 VC-4

Mapping mode VC-3, VC-4, VC-3-Xv,VC-4-Xv VC12, VC3 VC12, VC3

VC TRUNK number 2 8 4

Ethernet private line (EPL)



Does not supported Does not supported

Does not supported

Ethernet private LAN (EPLAN)

Does not supported Dose not supported

Dose not supported



Dose not supported

MPLS Does not supported Dose not supported

Dose not supported

VLAN Transparent transmission

Transparent transmission

Transparent transmission

Spanning tree Does not supported Dose not supported

Dose not supported

Multicast (IGMP Snooping)


Dose not supported

Encapsulation GFP, LAPS, HDLC GFP, LAPS, HDLC

GFP, LAPS, HDLC

LCAS Supported, compliant with ITU-T 7042. Supported Supported

CAR Does not supported ITU-T G.7042 ITU-T G.7042

Link stat pass through (LPT)

Supported Dose not supported

Dose not supported

Flow control Supported, compliant with IEEE802.3X. IEEE 802.3X IEEE 802.3X

Test frame Supported Supported Supported

Ethernet performance monitoring




6-4

6.1.2 Application

The OptiX OSN 1500 integrates the access of Ethernet services on the SDH transmission platform, so it can transmit both the voice service and data service.

1. EPL Service EPL implements the point-to-point transparent transmission of Ethernet service. As shown in Figure 6-1, the Ethernet services of different NEs are transmitted to the destination node through their respective VC Trunks. The Ethernet service is provided with a perfect SDH self-healing ring (SHR) protection scheme, and its reliable transmission is thus guaranteed.

SHR

1

3

4

5

Traffic flown

NE 4

NE 1

NE 2

NE 3

2

Figure 6-1 The EPL service

2. EVPL Service with VLAN Capability EVPL services are isolated through VLAN tags during bandwidth sharing. As shown in Figure 6-2, flow classification is performed for the Ethernet service according to the port and VLAN ID to distinguish different VLANs of Company A and B. Up to eight IEEE802.1P-compliant priorities can be set according to the flow classification result. For security purpose, the OptiX OSN 1500 isolates services of different users by VLAN. In the figure below, VLAN 1 of Company A shares a VC Trunk with VLAN 11 of Company B, VLAN 2 of Company A shares a VC Trunk with VLAN 12 of Company B, and VLAN 3 of Company A shares a VC Trunk with VLAN 13 of Company B. All services of Company A are converged to NE1 and output from the FE/GE interface of the NE1, and then are sent to the Lanswitch for further processing.



6-5

VLAN 1

VLAN 2

VLAN 13

VLAN 1

VLAN 2VLAN 3

Headquarters ofCompany B

Branch

Branch

Branch

VLAN 12

VLAN 3

VLAN 11 VLAN 12

VLAN 13

Headquartersof Company A

VLAN 11

1 3

2

Traffic flown

SHR

NE 1

NE 2

NE 3

NE 4

Figure 6-2 The EVPL service with VLAN tag

3. EVPL Service with MPLS Capability The OptiX OSN 1500 adopts the Martini modes to construct the multi-protocol label switching (MPLS) Layer 2 VPN and provide EVPL service. The EVPL service offers point-to-point connection and implements service convergence for users. As shown in Figure 6-3, the system will search the Port + Vlan ID table for the external label (Tunnel) and internal label (VC), and add them to the accessed Ethernet frames. Data transfer in the network is based on the MPLS label, which switched at the label switch path (LSP). Then, the data will be transmitted to the NE4 equipment, which strips the MPLS label and transfers the data to the corresponding port. The OptiX OSN 1500 integrates the function of P equipment and PE equipment.

Corp A

Company B Company B

NE1 NE4NE2 NE3Port APort B

Port APort B

Tunnel Label VC Label DataCompany60 10 ...A70 20 ...B... ... ......

60 10 Data70 20 Data

61 10 Data71 20 Data

10 Data20 Data

Tunnel labelswitching



NE4 strips the MPLS lablesand Transfers the frame tocorresponding ports

L2 MPLS network composedby OptiX OSN Products

Company ACompany A

6272

Figure 6-3 The EVPL service with MPLS label

4. EPLAN Service The OptiX OSN 1500 supports Layer 2 switching of Ethernet data, i.e. the EPLAN



6-6

service, which can be transferred according to their destination media access control (MAC) addresses. As shown in Figure 6-4, respective LANs of Company A and B are connected to four NEs. The Ethernet service between the NEs is not of a fixed point-to-point type. For example, a user of Company A connecting to NE3 may want to communicate with users of Company A connecting to other three NEs. That is, the flow direction of services is not definite. The Ethernet Layer 2 switching function provided by the OptiX OSN 1500 can be employed to solve such a problem. For example, an Ethernet MAC address transfer table will be formed in the system when the relevant settings are made to NE3. The system can learn to periodically update the table. Then, the data of Company A and B accessed at NE3 will be transmitted to their destinations over different VC Trunks selected according to their MAC transfer table or over the same VC Trunk. In this way, the system configuration is significantly simplified and the bandwidth utility is improved. In addition, the corresponding maintenance and management becomes convenient for the operator.

Company A Company B

NE1

Company A

Company B

Company A Company B

Company A

Company B

MAC Address Destinatio n VC-Trunk

MAC 1 NE1 MAC 2 NE4

MAC 3 NE2

NE2

NE3

NE41

23

SHR

n Traffic flow

Figure 6-4 Layer 2 switching of Ethernet service

5. EVPLAN Service The OptiX OSN 1500 adopts the Martini MPLS Layer 2 VPN encapsulation format to support the Ethernet virtual private LAN (EVPLAN) service. EVPLAN service implements the multipoint-to-multipoint connection of user sites. Users regard the EVPLAN network as a big VLAN where the user service can be converged. As shown in Figure 6-5, when the users Ethernet frame (the source address is MAC H, and the destination address is MAC A, B or C) enters the PE equipment, the system will search the Layer 2 transfer table for the internal label (VC label). Then, the frame is transferred to the corresponding tunnel, where it is attached with the external label (tunnel label). Thus, different LSPs are set up according to different addresses. The MPLS labels are switched at the LSP. And then transferred to the corresponding PE equipment, where the tunnel and VC labels are striped. After that, the Ethernet frame is transferred to the corresponding output port according to



6-7

the Layer 2 MAC transfer table.

Branch CP

Branch A

Headquarters

Branch B

PE

PE

PE

Address =MAC C

Address =MAC A

Address =MAC B

Address =MAC HSink VC LabelTunnel Label

MAC A 101MAC B 202MAC C 303

SourceMAC HMAC HMAC H

LSPLSP1LSP2LSP3

MPLSCore

LSP1 LSP2

LSP3

P PE

Transferd tocorrespondingport via the Layer2 route table

Figure 6-5 Application of EVPLAN service

6.1.3 Protection

The Ethernet service of the OptiX OSN equipment takes the protection of several levels, including: Protection of the spanning tree, LCAS and flow control Protection of optical transmission layer, such as MSP and SNCP

1. LCAS LCAS provides an error tolerance mechanism, enhancing the reliability of virtual concatenation. It has the following functions: Configure the system capacity, add or reduce the number of VC involved in the

virtual concatenation and change the service bandwidth dynamically without damaging the service.

Protect and recover failed members. As shown in Figure 6-6, LCAS can add or delete members to increase or decrease the bandwidth dynamically without affecting the service.



6-8

I want another 10 Mbandwidth. Member

Member HeadquartersBranch

BranchNew member

MSTP network

MSTP

Headquarters

Member

Member

Figure 6-6 LCAS adjusts bandwidth dynamically

As shown in Figure 6-7, LCAS can protect the Ethernet service. When some members fail, the failed members will be deleted automatically. While other members remain transmitting data normally. When the failed members are available again, they will be recovered automatically, and the data will be loaded to them again.

Member

Member HeadquartersBranch Failed member

Member

Member HeadquartersBranch

Delete failed member

MSTP network

MSTP

Figure 6-7 LCAS protects the virtual concatenation group

2. RSTP The Ethernet boards support spanning tree protocol (STP) and rapid spanning tree protocol (RSTP). When STP is started, modify the logic network topology to avoid potential broadcast storm.



6-9

3. Flow Control The Ethernet interface supports IEEE 802.3X flow control, minimizing the packet loss caused by congestion. As shown in Figure 6-8, the node connecting with Ethernet in duplex mode sends PAUSE frame to ask the receiving node to stop transmitting frame signals within a pause-time (N seconds), so as to avoid frame loss.

Duplex

Buffer is not full.

Pause framePause-time = N seconds

Pause framePause-time = 0 second

Data transmission

Ethernet switch

Ethernet switch MSTP

Data transmissionData transmission

Buffer is not full.

Buffer is not full.

Buffer is full.

Buffer is full.

Figure 6-8 Flow control at the Ethernet side

6.2 RPR Features

This section introduces the RPR features of the OptiX OSN 1500 in terms of function, application and protection.

6.2.1 Function

The EMR0 and EGR2 boards of the OptiX OSN 1500 supports resilient packet ring (RPR) features defined by IEEE 802.17. RPR employs a dual-ring structure utilizing a pair of unidirectional counter-rotating rings, as shown in Figure 6-9. Both the outer ring and the inner ring bear data packets and control packets, featuring high bandwidth utilization. The control packets on the inner ring carry control information for the data packets on the outer ring, and the control packets on the outer ring carry control information for the data packets on the inner ring. The two rings act as backup and protection for each other.



6-10

Node 1

Outer ring control

Node 2

Node 3

Node 42.5 Gbit/s RPR

Outer ring data

Inner ring dataInner ring control

Figure 6-9 RPR ring

2. EMR0 and EGR2 Function List Table 6-3 lists the basic functions of the EMR 0 and EGR2. Table 6-3 EMR0 and EGR2 function list

Function EMR0 EGR2

Interface 1 GE+12 FE 2 GE

Service frame format MPLS MPLS

JUMBO frame Supported, 9600 bytes Supported, 9600 bytes

Maximum uplink bandwidth 16 VC-4 (2.5 Gbit/s) 16 VC-4 (2.5 Gbit/s) Mapping VC-3, VC-3-2v, VC-4,

VC-4-Xv (X16) VC-3, VC-3-2v, VC-4, VC-4-Xv (X16)


Supported Supported


Supported Supported

MPLS Support MartiniOE and stack VLAN

Support MartiniOE and stack VLAN

VLAN Supports 4096 VLAN labels, as well as adding, deletion and exchange of VLAN labels, compliant with IEEE 802.1q/p

Supports 4096 VLAN labels, as well as adding, deletion and exchange of VLAN labels, compliant with IEEE 802.1q/p

Spanning tree Support STP and RSTP Support STP and RSTP

Multicast (IGMP Snooping) Supported Supported



6-11

Function EMR0 EGR2

RPR protection Steering, Wrapping, Wrapping + Steering. The switching time is less than 50ms.

Steering, Wrapping, Wrapping + Steering. The switching time is less than 50ms.

Encapsulation GFP, compliant with ITU-T G.7041. LAPS, compliant with ITU-T X.86.

GFP, compliant with ITU-T G.7041. LAPS, compliant with ITU-T X.86.

LCAS Supported, compliant with ITU-T 7042.

Supported, compliant with ITU-T 7042.

CAR Based on port or port + VLAN, with the granularity as 64 kbit/s.

Based on port or port + VLAN, with the granularity as 64 kbit/s.

Flow control Supported, compliant with IEEE802.3X and IEEE802.3Z.

Supported, compliant with IEEE802.3X and IEEE802.3Z.

Port aggregation Supports port aggregation and complies with IEEE802.3ad.

Supports port aggregation and complies with IEEE802.3ad.

Weighted fairness algorithm

Supported Supported

Topology discovery Supported Supported

Service class A0, A1, B_EIR, B_CIR and C

A0, A1, B_EIR, B_CIR and C

3. Service Class The user service has three classes, A, B and C. Class A falls into A0 and A1. Class B falls into B_CIR (Committed Information Rate) and B_EIR (Excess Information Rate). Table 6-4 gives the difference of these classes. Table 6-4 RPR service class

Class Sub-class Bandwidth Jitter Fair algorithm Application

A0 Allocated, irreclaimable

Low Irrelevant Real time A

A1 Allocated, reclaimable

Low Irrelevant Real time

B_CIR Allocated, reclaimable

medium Irrelevant Near real time B

B_EIR Opportunistic High Relevant Near real time

C C Opportunistic High Relevant Best effort



6-12

4. Topology Discovery The topology discovery function realizes the plug and play feature, for the function provides reliable method to discover the network nodes and their variation. In this case, the nodes of an RPR can be automatically added, deleted and switched. There may be more than one EMR0 in equipment, so an NE may have more than one RPR node. The plug and play feature allows adding or deleting nodes without affecting the services on an RPR. To increase or decrease the total bandwidth of an RPR, use the LCAS function. The LCAS features adding and reducing bandwidth dynamically without affecting existing services.

5. Spatial Reuse The stripping of unicast frames at the destination station realizes spatial reuse on an RPR. As shown in Figure 6-10, the bandwidth of a ring is 1.25 Gbit/s. Traffic 1 transferred from node 1 to node 4 is stripped from the ring at the destination node 4. After the arrival of traffic 1 at node 4, traffic 2 can be transferred from node 4 to node 3, by occupying the link capacity that would have been occupied by traffic 1 if it is not stripped at node 4.

Node 1

Bandwidth of single ring is1.25Gbit/s

Node 2

Node 3

Node 4Dual-ring2.5 Gbit/s RPR

Traffic 11.25 Gbit/s

Traffic 21.25 Gbit/s

Figure 6-10 Spatial reuse

6. Fairness Algorithm The outer ring and the inner ring of an RPR support independent weighted fairness algorithm. The fairness algorithm assures access of the low-class B_EIR and C services. The weight of the fairness algorithm is provisionable to decide the access rate of a node. A node needs to set weights at the outer and the inner rings, and the two weights decide the bandwidth of low-class services upon bandwidth contention. As shown in Figure 6-11, the outer ring weights of nodes 2, 3 and 4 are 1. Suppose the available bandwidth on the outer ring for low-class services is 1.2 Gbit/s, the fairness algorithm will allocate 400 Mbit/s for the low-class services from nodes 2, 3 and 4 to node 1 respectively. Figure 6-12 shows a fairness algorithm with different weights: the weights of nodes 2, 3 and 4 on the outer ring are 1, 3 and 2 respectively. The fairness



6-13

algorithm allocates 200 Mbit/s for node 2, 600 Mbit/s for node 3 and 400 Mbit/s for node 4.

Node 1

Node 2

Node 5

Node 6

Dual-ring2.5 Gbit/s RPR

Node 4

Node 31

3

2

23

Traffic Bandwidth400 Mbit/s400 Mbit/s400 Mbit/s

1

Node3Node4

Node WeightNode2 1

11

Figure 6-11 Fairness algorithm when the weight is 1

Node 1

Node 2

Node 5

Node 6


Node 4

Node 31

3

2

23

Traffic Bandwidth200 Mbit/s600 Mbit/s400 Mbit/s

1

Node3Node4

Node WeightNode2 1

32

Figure 6-12 Fairness algorithm when the weights are different

6.2.2 Application

The EMR0 board supports the application of EVPL and EVPLAN services.

1. EVPL The EVPL service supports traffic classification based on port or port + VLAN, and encapsulates and forwards the traffic in the form of MPLS MartiniOE. Figure 6-13 illustrates the accessing, forwarding and stripping of a unidirectional EVPL service. Node 2 inserts Tunnel and VC labels to the packet, sends it to the RPR. Node 3 forwards the packet and the destination node 4 strips it. Figure 6-14 illustrates the



6-14

EVPL service convergence, implementing traffic classification through port + VLAN, so that services can be concentrated at the GE port of node 1.

Node 1

Node 3

FE/GE


ActionTunnel

VCDestination

Insertion100100

Node 4

LSP ActionTunnel

VC

Stripping100100

Action Forwarding

Node 4Node 2FE/GE

Figure 6-13 EVPL accessing, forwarding and stripping

Node 1

Node 3


FE

FE

GE

Node 2 Node 4

Traffic Tunnel DestinationPort1+VLAN 2

VC200 Node 2200

Port1+VLAN 3 300 Node 3300Port1+VLAN 4 400 Node 4400

FEVLAN 2

VLAN 3

VLAN 4

VLAN 4

VLAN 3VLAN 2

Figure 6-14 EVPL service convergence

2. EVPLAN The EVPLAN service supports traffic classification based on port or port + VLAN, and encapsulates and forwards the traffic in the form of MPLS stack VLAN. The EVPLAN service is realized by creating virtual bridge (VB) in the board. Each board may have up to 32 VBs, each of which has 16 logic ports. VB supports source MAC address learning and static MAC route configuration. Figure 6-15 shows an example of EVPLAN service. The VB of each node determines the forward port of packets through address learning, rpr1 is the port to access packets to the RPR. For node 1, if



6-15

the destination address is A1, the packet is forwarded through port 1; if the destination is A2, the packet is forwarded through port 2. If the destination is B1, B2 or C1, the packet is forwarded through port rpr1 to the RPR, added with a stack VLAN label being 100. Node 2 forwards packets in the same way.

Node 1

Node 3


Node 2 Node 4

MAC VMANPortA1 noneA2 noneport 2B1 100rpr1

Port 1

B2 100rpr1C1 100rpr1

Port 2

Port 1

Port 2

Port 1

A1 A2

B1

B2

C1

port 1

MAC forwarding table of node 1

MAC VMANPortA1 100A2 100rpr1B1 noneport 1B2 noneport 2C1 100rpr1

rpr1

MAC forwarding table of node 2

Figure 6-15 EVPLAN service

6.2.3 Protection

The RPR service of the OptiX OSN equipment takes the protection of several levels, including: Wrap and Steering Spanning tree and LCAS Protection of optical transmission layer, such as MSP and SNCP

1. Wrap If an equipment or facility failure is detected, the traffic is wrapped back to the opposite direction at the stations adjacent to the failure, connecting the outer ring with the inner ring. The protection switching time is less than 50ms. Though featuring fast protection switching, wrap protection wastes bandwidth. As illustrated in Figure 6-16, traffic is transferred from node 4 to node 1 through nodes 3 and 2. If there is a fiber cut between node 2 and node 3, they will wrap the traffic and connect the two rings together for protection.



6-16

Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

XFiber cut Traffic flow

Figure 6-16 Wrap protection

2. Steering For steering protection, a station shall not wrap a failed segment when a failure is detected. Instead, the source node will send traffic to the destination through a route avoiding the failed link. The protection switching time is less than 50ms. The steering protection does not waste bandwidth, however, it needs longer switching time and some data before setting up a route may be lost. Figure 6-17 illustrates an example of steering protection. Node 4 sends traffic to node 1 on the outer ring through nodes 3 and 2. If there is a fiber cut between node 2 and node 3, the topology discovery function can help the traffic be transferred to node 1 over the inner ring through nodes 5 and 6.

Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

XFiber cut

Traffic flowafter switching

Traffic flow beforeswitching

Figure 6-17 Steering protection



6-17

3. Spanning tree and LCAS The EMR0 supports spanning tree protocol (STP) and rapid spanning tree protocol (RSTP). When STP is started, modify the logic network topology to avoid potential broadcast storm. LCAS can add and reduce the bandwidth dynamically, as well as protect the bandwidth. For details about spanning tree and LCAS, refer to 6.1 Ethernet.

6.3 ATM Features

This section describes the ATM features of the OptiX OSN 1500 in terms of functionality, application, and protection.

6.3.1 Functions

The OptiX OSN 1500 provides two kinds of ATM processing boards, ADL4 and ADQ1. An ADL4 board can access and process one STM-4 ATM service and an ADQ1 board can access and process four STM-4 ATM services. When working with the PL3/PD3 board, the ADL4 board or ADQ1 board can access and process E3 ATM services. The functions of the two boards are listed in Table 6-5. Table 6-5 Functions of the two ATM boards

Board Function

ADL4/IDL4 ADQ1/IDQ1

Front panel interface 1 x STM-4 4 x STM-1

Optical interface index S-4.1, L-4.1 Ie-1, S-1.1, L-1.1

Optical interface type Hot swappable LC (SFP) Hot swappable LC (SFP) E3 ATM interface Access 12 x E3 services

through the PD3/PL3 board Access 12 x E3 services through the PD3/PL3 board


8 VC4s, or 12 VC3s + 4 VC4s

8 VC4s, 12 VC3s + 4 VC4s

ATM switching capability 1.2 Gbit/s 1.2 Gbit/s

Mapping mode VC3, VC4, VC4-4c, or VC4-Xv (X=1 4)

VC3, VC4, VC4-4c, VC4-Xv (X=1 4)

Processable service types CBR, rt-VBR, nrt-VBR and UBR

CBR, rt-VBR, nrt-VBR and UBR

Number of ATM connections

2048 2048

Traffic type and QoS IETF RFC2514 IETF RFC2514

Supportable ATM multicast connections

Spatial multicast and logic multicast

Spatial multicast and logic multicast



6-18

Board Function

ADL4/IDL4 ADQ1/IDQ1

ATM protection (ITU-T I.630)

Unidirectional/bidirectional 1+1/1:1 VP-Ring or VC-Ring

Unidirectional/bidirectional 1+1/1:1 VP-Ring or VC-Ring

OAM function (ITU-T I.610)

AIS, RDI, LB (Loopback), CC (continuity check)

AIS, RDI, LB, CC

6.3.2 Application

1. Supportable Services and Traffic Types The OptiX OSN 1500 supports CBR, rt-VBR, nrt-VBR, and UBR services rather than ABR services. CBR services apply to voice services, as well as video services and circuit simulation services of a constant bit rate. These services require guaranteed transmission bandwidth and latency. Rt-VBR services apply to audio and video services of a variable bit rate. Nrt-VBR services are mainly used for data transmission. UBR services are generally used for LAN simulation and file transmission. In terms of the supported service and traffic types, the OptiX OSN 1500 meets IETF RFC2514, ATM Forum TM 4.0 and ATM Forum UNI 3.1 recommendations, as shown in the Table 6-6. Table 6-6 Supportable ATM service and traffic types of the OptiX OSN 1500

No. Traffic type Service type Parameter

1 atmNoTrafficDescriptor UBR None

UBR.1 Clp01Pcr 2 atmNoClpNoScr

CBR Clp01Pcr

3 atmClpNoTaggingNoScr CBR Clp01Pcr, Clp0Pcr

4 atmClpTaggingNoScr CBR Clp01Pcr, Clp0Pcr

5 atmNoClpScr nrt-VBR.1 Clp01Pcr, Clp01Scr, Mbs

6 atmClpNoTaggingScr nrt-VBR.2 Clp01Pcr, Clp0Scr, Mbs

7 atmClpTaggingScr nrt-VBR.3 Clp01Pcr, Clp0Scr, Mbs

8 atmClpNoTaggingMcr ABR Clp01Pcr, Cdvt, Mcr

9 atmClpTransparentNoScr CBR.1 Clp01Pcr, Cdvt

10 atmClpTransparentScr rt-VBR.1 Clp01Pcr, Clp01Scr, Mbs, Cdvt

11 atmNoClpTaggingNoScr UBR.2 Clp01Pcr, Cdvt

UBR Clp01Pcr, Cdvt 12 atmNoClpNoScrCdvt

CBR Clp01Pcr, Cdvt

13 atmNoClpScrCdvt rt-VBR.1 Clp01Pcr, Clp01Scr, Mbs, Cdvt



6-19

No. Traffic type Service type Parameter

14 atmClpNoTaggingScrCdvt rt-VBR.2 Clp01Pcr, Clp0Scr, Mbs, Cdvt

15 atmClpTaggingScrCdvt rt-VBR.3 Clp01Pcr, Clp0Scr, Mbs, Cdvt Note: The OptiX OSN products do not support the number 8 traffic type, which is for ABR services.

2. Application of Band exclusive ATM Services When the bandwidth is not shared, ATM services at the source and sink NEs are only processed at the ATM layer through the ATM service process board. On intermediate NEs, only SDH timeslot pass-through is performed, without ATM layer processing. In this case, each ATM service has the whole VC3/VC4 channel to itself. The ATM services are converged at the central node and then multiplexed to an STM-1 or STM-4 optical port for output. As shown in the Figure 6-18, the 34 Mbit/s ATM services of NE1 and NE3 each occupy a VC3 bandwidth. The 155 Mbit/s ATM service of NE2 occupies a VC4 bandwidth alone. SDH timeslot pass-through is only performed at NE3. After they reach the central site NE4, they are converged through the ATM board and output through the 622 Mbit/s optical interface.

2.5 Gbit/s SDHRing

NE 2 NE 4

NE 1

NE 3

34M ATMTraffic

34M ATMTraffic

155M ATMTraffic 622M ATMTraffic

ServiceConvergence

DSLAM

DSLAM

RouterDSLAM

Figure 6-18 Application of Band exclusive ATM Services

3. Application of Band-Shared ATM Services In shared rings VR-Ring and VC-Ring, the ATM services share the same bandwidth and are multiplexed statistically. The ATM services on each NE share the same VC (VC3, VC4, or VC-Xv) and are all processed on ATM layer. As shown in the Figure 6-19, NE1 accesses E3 ATM traffic through the tributary board and sends it to the ATM board for ATM switching and protection (1+1/1:1) configuration. Then the traffic is encapsulated into VC4-Xv and sent to the line through the cross-connect board. NE2



6-20

accesses STM-1 ATM traffic through the optical interface and then implements ATM switching and protection configuration. The ATM traffic from NE1 is also dropped at NE2 for ATM layer processing. Then the locally accessed traffic and that from NE1 are encapsulated into the same VC4-Xv and sent to the next NE. The same goes at NE3 and NE4. A single VP/VC-Ring can have a maximum bandwidth of 300 Mbit/s.

VC4-XvVP/VC-Ring

NE 2

NE 4

NE 1

NE 3

34M ATMTraffic

34M ATMTraffic

155M ATMTraffic

622M ATMTraffic

DSLAM

DSLAM

Router

DSLAM

The ATM traffic from NE1is droped to the NE2, thensend to VP/VC-Ring afterconverged with localservice.

Figure 6-19 VP/VC-Ring

6.3.3 Protection

The ATM service of the OptiX OSN equipment is protected on many layers, including: Protection on the ATM layer Protection on the optical transmission layer, such as MSP, and SNCP.

1. Protection on the ATM layer Compliant with ITU-T Recommendation I.630, protection on the ATM layer can be classified into many types according to different classification method, as shown in the Table 6-7. You can select the configuration as required, for example, 1+1 bidirectional non-revertive protection. Table 6-7 Classification of ATM protection

Classification mode Type 1 Type 2

Bridging function 1+1 protection 1:1 protection

Switching direction Unidirectional protection Bidirectional protection

Connection level VPC protection VCC protection

Protection domain Trail protection Subnetwork connection protection



6-21

Classification mode Type 1 Type 2

Reversibility Reversibility protection Non-revertive protection

Protected object Single connection protection Group connection protection

2. Protection on the optical transmission layer The ATM service is also protected by the self-healing network on the optical transmission layer, such as MSP and SNCP. You can set the hold-off time for ATM protection switching. When network impairment occurs, the MSP or SNCP on lower layers can be switched first, thus achieving the protection of working ATM service (in this case, the protection switching on the ATM layer will not be activated).

6.4 SAN Features

The OptiX OSN 1500 provides a multi-service transparent transmission processing board: MST4, to access and transmit transparently fiber channel (FC), fiber connection (FICON), enterprise systems connection (ESCON) and digital video broadcast asynchronous serial interface (DVB-ASI) services. The MST4 supports the following functions: Table 6-8 Functions of the MST4 board

Board Function

MST4

Optical interface 4

Optical interface type Swappable LC (SFP) Bandwidth 2.5 Gbit/s

FC50, FC100/FICON and FC200

Provide 4 x FC (FC50, FC100/FICON and FC200), with total bandwidth less than 2.5 Gbit/s. Support transmission of FC service at full rate, that is, support FC200, 2 x FC100, or 4 x FC50.

Distance The first and second interfaces support SDH side distance extension function: FC100 supports 3000 km, and FC200 supports 1500 km. The first and second interfaces support client side distance extension function: FC100 supports 40 km, and FC200 supports 20 km.

Mapping mode VC-4, VC-4-xc (x=4, 8, 16) ESCON Support 4 x ESCON or DVB-ASI services.

DVB-ASI Support 4 x ESCON or DVB-ASI services.

The services and rates provided by the MST4 are shown in Table 6-9 Table 6-9 Services and rates provided by the MST4



6-22

Service type Rate Remarks

FC50 531.25 Mbit/s SAN service

FC100/FICON 1062.5 Mbit/s SAN service

FC200 2125 Mbit/s SAN service

ESCON 200 Mbit/s SAN service

DVB-ASI 270 Mbit/s Video service

OptiX OSN 1500 Technical Manual - System Description 7 Protection


7-1

7 Protection This chapter describes the complete protection schemes, at the equipment level and network level, provided by the OptiX OSN 1500. It covers: Equipment level protection Network level protection

7.1 Equipment Level Protection

The OptiX OSN 1500 supports the following protection schemes at the equipment level: TPS protection for service processing boards 1+1 hot backup protection for the SCC unit, cross-connect matrix and synchronous

timing unit 1+1 hot backup protection for power input unit 1:N protection for the +3.3 V board power supply Abnormality-specific service protection

7.1.1 TPS Protection for Service Processing Boards

1. OptiX OSN 1500 A OptiX OSN 1500 A support 1:1 TPS of E1.

2. OptiX OSN 1500 B The OptiX OSN 1500 B provides 1:N TPS protection for the PQ1, PQM, PL3, PD3, SPQ4, SEP1 boards. That is, it provides TPS protection for the E1, T1, E3, DS3, E4, STM-1 and Ethernet services. E1 processing board supports two 1:N (N2) TPS protection groups. E1/T1 processing board supports one 1:N (N2) TPS protection group. E3/T3 processing board supports one 1:1 TPS protection group. E4/STM-1 processing board supports one 1:1 TPS protection group.



7-2

7.1.2 1+1 Hot Backup for the Cross-Connect Unit and Timing Unit

The cross-connection and timing functions are provided by the CXL board. The CXL board use 1+1 backup for protecting the cross-connect unit and the timing unit at the same time. When the active cross-connect and timing units are working normally, the standby ones are in standby working mode, not performing the service cross-connection function nor providing timing to the system. They have the same cross-connect matrix setting and clock configuration as the active units. When the standby units receive the information indicating abnormal performance of the active units or a switching command sent by the NM system, they will immediately take over the job of the active units, setting themselves to the active working mode and sending out a switchover alarm.

7.1.3 1+1 Hot Backup for the SCC Unit

The SCC unit of the OptiX OSN 1500 is provided with 1+1 backup protection. The standby SCC unit is in standby working mode when the active one is working normally.

7.1.4 1+1 Hot Backup for the Power Input Unit

Through the two PIU boards, the OptiX OSN 1500 can access two 48 V DC working power supplies that work in backup mode. If either of them goes faulty, the other will operate to ensure the normal operation of the equipment.

7.1.5 1:N Protection for the +3.3 V Board Power Supply

The OptiX OSN 1500 provides 1:N power backup for the +3.3 V power supplies of other boards through the power backup unit of the AUX board. When the power supply of a board becomes faulty, the backup power will take over the power feeding job to ensure normal operation of that board.

7.1.6 Abnormality-Specific Service Protection

1. Power Failure in Software Loading Process Application program and data have the check function. In the case the loading is interrupted, the basic input/output system (BIOS) will not start the unfinished program and data until they are successfully loaded.

2. Board Temperature Check Temperature detection circuit is provided on the boards that generate much heat. When the ambient temperature detected is too high, an alarm is generated to remind the maintenance personnel to clean the fans.



7-3

7.2 Network Level Protection

7.2.1 Basic Networking Modes

Chain and ring are two basic structures of the transmission network. Various complicated network structures can derive from them, as shown in Table 7-1. Table 7-1 Basic networking modes

Networking mode

Topology map

1 Chain

2 Ring

3 Tangent rings

4 Intersecting rings

5 Ring with chain

6 DNI



7-4

Networking mode

Topology map

7 Hub

Legend: MADM ADM TM

7.2.2 SDH Trail Protection

The OptiX OSN 1500 can implement the linear MSP and the MSP ring.

Date post:	06-Nov-2015
Category:	Documents
Upload:	nguyendinhdan
View:	227 times
Download:	5 times

OSN1500 System Description

Documents