Hardware Description - Huawei - Building A Better ... document provides an overall description of...

S2750 Series Ethernet Switches

Hardware Description

Issue 04

Date 2014-03-20

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2014. All rights reserved.

No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://enterprise.huawei.com

Issue 04 (2014-03-20) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

i

http://enterprise.huawei.com

About This Document

Intended AudienceThis document provides an overall description of the S2750 hardware, helping you obtaindetailed information about each chassis, cable, and optical module.

This document is intended for:

l Network planning engineers

l Hardware installation engineers

l Commissioning engineers

l On-site maintenance engineers

l System maintenance engineers

Symbol ConventionsThe symbols that may be found in this document are defined as follows.

Symbol Description

Indicates an imminently hazardous situationwhich, if not avoided, will result in death orserious injury.

Indicates a potentially hazardous situationwhich, if not avoided, could result in death orserious injury.

Indicates a potentially hazardous situationwhich, if not avoided, may result in minor ormoderate injury.

Indicates a potentially hazardous situationwhich, if not avoided, could result inequipment damage, data loss, performancedeterioration, or unanticipated results.NOTICE is used to address practices notrelated to personal injury.

S2750 Series Ethernet SwitchesHardware Description About This Document


ii

Symbol Description

NOTE Calls attention to important information, bestpractices and tips.NOTE is used to address information notrelated to personal injury, equipment damage,and environment deterioration.

Command ConventionsThe command conventions that may be found in this document are defined as follows.

Convention Description

Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italics.

[ ] Items (keywords or arguments) in brackets [ ] are optional.

{ x | y | ... } Optional items are grouped in braces and separated byvertical bars. One item is selected.

[ x | y | ... ] Optional items are grouped in brackets and separated byvertical bars. One item is selected or no item is selected.

{ x | y | ... }* Optional items are grouped in braces and separated byvertical bars. A minimum of one item or a maximum of allitems can be selected.

[ x | y | ... ]* Optional items are grouped in brackets and separated byvertical bars. Several items or no item can be selected.

&<1-n> The parameter before the & sign can be repeated 1 to n times.

# A line starting with the # sign is comments.

Change HistoryChanges between document issues are cumulative. The latest document issue contains allchanges made to previous issues.

Changes in Issue 04 (2014-03-20)

This version has the following updates:

The documentation is modified according to updates in product features.



iii

Changes in Issue 03 (2013-09-30)This version has the following updates:

The following information is modified:l 2.2 Naming Conventionsl 3.6 High-Speed Cable

Changes in Issue 02 (2013-07-25)This version has the following updates:

The following information is modified:l 4 Optical Module

Changes in Issue 01 (2013-05-30)Initial commercial release.



iv

Contents

About This Document.....................................................................................................................ii

1 Version Support for Components..............................................................................................11.1 Components Available in V200R003C00 Version........................................................................................................21.2 Components Available in V200R005C00 Version........................................................................................................2

2 Chassis.............................................................................................................................................42.1 Chassis Overview...........................................................................................................................................................52.2 Naming Conventions......................................................................................................................................................52.3 S2750-EI.........................................................................................................................................................................62.3.1 Version Mapping.........................................................................................................................................................62.3.2 Appearance and Structure............................................................................................................................................72.3.3 Indicator Description.................................................................................................................................................102.3.4 Port Description.........................................................................................................................................................182.3.5 Power Supply Configuration.....................................................................................................................................212.3.6 Heat Dissipation........................................................................................................................................................222.3.7 Specifications.............................................................................................................................................................22

3 Cables.............................................................................................................................................263.1 Ground Cable................................................................................................................................................................273.2 Optical Fiber.................................................................................................................................................................273.3 Network Cable..............................................................................................................................................................323.4 AC Power Cable...........................................................................................................................................................343.5 Console Cable...............................................................................................................................................................353.6 High-Speed Cable.........................................................................................................................................................36

4 Optical Module............................................................................................................................394.1 Basic Concepts.............................................................................................................................................................404.2 SFP/eSFP Modules.......................................................................................................................................................42

S2750 Series Ethernet SwitchesHardware Description Contents


v

1 Version Support for Components

About This Chapter

NOTE

l The availability of device models and modules described in this document will be specified in productchange notices (PCNs). For details, contact the product manager of Huawei local office.

l The figures in this document are for reference only.

1.1 Components Available in V200R003C00 Version


S2750 Series Ethernet SwitchesHardware Description 1 Version Support for Components


1


NOTE

Components marked with * are added in V200R003C00 version.

Available Models

Table 1-1 lists the switch models available in V200R003C00.

Table 1-1 Switch models available in V200R003C00

Series Model Maximum Number of Ports

S2750-EI S2750-28TP-EI-AC*

28 total:24 Ethernet 10/100 ports, 2 Gig SFP and 2 combo10/100/1000 or SFP

S2750-20TP-PWR-EI-AC*

20 total:16 Ethernet 10/100 PoE+ ports, 2 Gig SFP and 2combo 10/100/1000 or SFP




28 total:12 Ethernet 10/100 PoE+ ports, 12 Ethernet 10/100ports, 2 Gig SFP and 2 combo 10/100/1000 or SFP


Available Models

Table 1-2 lists the switch models available in V200R005C00.

Table 1-2 Switch models available in V200R005C00


S2750-EI S2750-28TP-EI-AC 28 total:24 Ethernet 10/100 ports, 2 Gig SFP and 2 combo10/100/1000 or SFP



2


S2750-20TP-PWR-EI-AC





28 total:12 Ethernet 10/100 PoE+ ports, 12 Ethernet 10/100ports, 2 Gig SFP and 2 combo 10/100/1000 or SFP



3

2 Chassis

About This Chapter

2.1 Chassis Overview

2.2 Naming Conventions

2.3 S2750-EI

S2750 Series Ethernet SwitchesHardware Description 2 Chassis


4

2.1 Chassis Overview

Huawei S2750 series Ethernet switches provide the access, aggregation, and data transportfunctions. They meet requirements for reliable access and aggregation and high-qualitytransmission of multiple services on enterprise networks. S2750 switches use an integratedhardware platform. S2750 hardware consists of the chassis, power module, fan module, andswitch control unit (SCU).

The S2750 switch models include S2750-28TP-EI-AC, S2750-20TP-PWR-EI-AC,S2750-28TP-PWR-EI-AC, and S2751-28TP-PWR-EI-AC.

2.2 Naming Conventions

Figure 2-1 shows the switch naming conventions.

Figure 2-1 Switch naming conventions

S2750-20TP-PWR-EI-ACABC D E F G H I

Table 2-1 explains the switch naming conventions.

Table 2-1 Switch naming convention description

Identifier

Description

A Switch

B l 6: 10GE downlink portsl 5: GE downlink portsl 3: Layer 3 switch with 100M downlink portsl 2: Layer 2 switch with 100M downlink ports

C 7: Enterprise series switch

D Product sub-series (such as 00, 10)

E Maximum number of ports



5

Identifier

Description

F Uplink port type:l C: The product can use an extended card to provide uplink ports.l X: The product has fixed 10GE uplink ports.l TP: The uplink ports of the product are combo ports comprised of optical and

electrical ports.l P: The uplink ports of the product are fixed GE optical ports.

G Power over Ethernet (PoE) modelNOTE

If this field is not included, the switch does not support PoE.

H Device typel LI: lightweight versionl SI: standard versionl EI: enhanced versionl HI: high-level version, which supports high-performance operation,

administration, and maintenance (OAM) and built-in real-time clock (RTC)

I Powering mode:l AC: alternating current powerl DC: direct current power

2.3 S2750-EI

2.3.1 Version Mapping

Table 2-2 lists the mapping between the S2750-EI series switches and software versions.

Table 2-2 Matching between the S2750-EI series switches and software versions

DeviceSeries

Device Model Available Version

S2750-EI S2750-28TP-EI-AC V200R003C00 and later versions

S2750-20TP-PWR-EI-AC V200R003C00 and later versions





6

2.3.2 Appearance and Structure

S2750-28TP-EI-AC

Figure 2-2 Appearance of the S2750-28TP-EI-AC

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

3 41 2

MODE

STCKSTATSYSPWR

HUAWEI

S2750-28TP-EI-AC 1G/STACK-2.5G 1G 1G

CONSOLE

~100-240V;50/60Hz;0.8A

1

5 6

2 3

7

4

1 Twenty-four 10/100BASE-TX electricalports

2 Two 1000BASE-X optical ports

Applicable modules and cables:l GE optical modulel GE-CWDM optical modulel GE-DWDM optical modulel GE SFP copper modulel Stack optical modulel 1 m, 3 m, 10 m SFP+ copper cablesl 3 m, 10 m AOC cables

3 Two combo ports (10/100/1000BASE-T+100/1000BASE-X)

Modules applicable to combo opticalports:l FE optical modulel GE optical modulel GE-CWDM optical modulel GE-DWDM optical module

4 One console port

5 Ground screwNOTE

It is used with a ground cable.

6 AC power socketNOTE

It is used with an AC power cable.



7

7 Jack reserved for AC terminal lockinglatchNOTE

The AC terminal locking latch is not deliveredwith the device.

- -


Figure 2-3 Appearance of the S2750-20TP-PWR-EI-AC

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

3 41 2

MODE

STCKPOE

STATSYSPWR

HUAWEI

S2750-20TP-PWR-EI-AC 1G/STACK-2.5G 1G 1G

CONSOLE

~100-240V;50/60Hz;7A

1

5 7

2 3

6

4

1 Sixteen PoE+ 10/100BASE-TXelectrical ports





4 One console port

5 Ground screwNOTE






8



- -



~100-240V;50/60Hz;7A

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

3 41 2

MODE

STCKPOE

STATSYSPWR

HUAWEI


CONSOLE

1

5 7

2 3

6

4

1 Twenty-four PoE+ 10/100BASE-TXelectrical ports





4 One console port

5 Ground screwNOTE






9



- -



1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

3 41 2

MODE

STCKPOE

STATSYSPWR

HUAWEI


CONSOLE

PoE 1-12

~100-240V;50/60Hz;7A

1 2

6 7 8

3 4 5

1 Twelve PoE+ 10/100BASE-TXelectrical ports

2 Twelve 10/100BASE-TX electricalports





5 One console port 6 Ground screwNOTE






2.3.3 Indicator Description

Table 2-3 is a quick reference table for indicators of S2750-EI switches.



10

Table 2-3 S2750-EI indicator quick reference table

Switch Model Indicator Description

S2750-28TP-EI-AC

The indicator symbols and meanings are described in S2750-28TP-EI-AC.


The symbols and meanings of indicators on the S2751-28TP-PWR-EI-AC and S2750-20TP-PWR-EI-AC are the same as those on theS2750-28TP-PWR-EI-AC. S2750-28TP-PWR-EI-AC is used as anexample here.S2750-20TP-

PWR-EI-AC


S2750-28TP-EI-AC

Figure 2-6 Indicators on the S2750-28TP-EI-AC

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

3 41 2

MODE

STCKSTATSYSPWR

HUAWEI

S2750-28TP-EI-AC 1G/STACK-2.5G 1G 1G

CONSOLE

1 6

5

2

43

1 2 3 4 5 6 7 8

MODE

STCKSTATSYSPWR

HUAWEI

S2750-28TP-EI-AC

1

5

2

43

19 20 21 22 23 24

1 2

1G/STACK-2.5G

6

Table 2-4 Description of indicators on the S2750-28TP-EI-AC

Number

Indicator/Button

Color Description

1 PWR: powersupply indicator

Off The device is powered off.

Green Steady on: The system power supply isnormal.

2 SYS: systemstatus indicator

Off The system is not running.



11

Number

Indicator/Button

Color Description

Green l Fast blinking: The system is starting.l Slow blinking: The system is running

properly.

Red Steady on: After registering, the systemdoes not operate properly, or a temperaturealarm has been generated.

3 STAT: statusindicator

Off The status mode is not selected.

Green Steady on: The status mode (default mode)is selected. If the status mode is selected,the service port indicator shows the portlink or activity state.

4 STCK: stackindicator

Green If you are not changing the indicator mode(default):l Off: The switch is in stack standby or

slave state or the stacking function isnot enabled on the switch.

l Blinking: The switch is a stack masterswitch or a standalone switch with thestacking function enabled.

If you are changing the indicator mode:l Off: The stack mode is not selected.l Steady on: The switch is a standby or

slave switch in a stack, and the serviceport indicators show the stack ID of theswitch.

l Blinking: The switch is the masterswitch in a stack or a standalone switch,and the service port indicators show thestack ID of the master switch.

After 45 seconds, the service portindicators automatically restore to statusmode.



12

Number

Indicator/Button

Color Description

5 MODE: modeswitch button

- l When you press this button once, theservice port indicators change to stackmode and show the stack ID of the localswitch.

l When you press this button a secondtime, the STAT indicator turns greenand the service port indicators restoreto the default mode.

If you do not press the MODE buttonwithin 45 seconds, the service portindicators restore to the default mode. Inthis case, the STAT indicator is steadygreen, and the STCK indicator is off orblinking green.

6 Service portindicatorl FE electrical

ports: Theports arenumberedfrom bottomto top and leftto right,starting with1.

l GE ports:Each GE porthas anindicatorabove it.

Meanings of service port indicators vary in different modes.For details, see Table 2-6.



13


Figure 2-7 Indicators on the S2750-28TP-PWR-EI-AC

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

3 41 2

MODE

STCKPOE

STATSYSPWR

HUAWEI


CONSOLE

1 7

6

2

543

1 2 3 4 5 6 7 8

MODE

STCKPOE

STATSYSPWR

HUAWEI


1

6

2

54

318 19 20 21 22 23 24

1 2

1G/STACK-2.5G

7

Table 2-5 Indicators on the S2750-28TP-PWR-EI-AC

Number Indicator/Button

Color Description

1 PWR: powersupply indicator

Off The device is powered off.

Green Steady on: The system power supply isnormal.

2 SYS: systemstatus indicator

Off The system is not running.

Green l Fast blinking: The system is starting.l Slow blinking: The system is running

properly.

Red Steady on: After registering, the systemdoes not operate properly, or a fan ortemperature alarm has been generated.

3 STAT: statusindicator

Off The status mode is not selected.

Green Steady on: The status mode (default mode)is selected. If the status mode is selected,the service port indicator shows the portlink or activity state.



14


Color Description

4 STCK: stackindicator

Green If you are not changing the indicator mode(default):l Off: The switch is in stack standby or

slave state or the stacking function isnot enabled on the switch.

l Blinking: The switch is a stack masterswitch or a standalone switch with thestacking function enabled.

If you are changing the indicator mode:l Off: The stack mode is not selected.l Steady on: The switch is a standby or

slave switch in a stack, and the serviceport indicators show the stack ID of theswitch.

l Blinking: The switch is the masterswitch in a stack or a standalone switch,and the service port indicators show thestack ID of the master switch.

After 45 seconds, the service portindicators automatically restore to statusmode.

5 PoE: PoE modeindicator

Off The PoE mode is not selected.

Green Steady on: The service port indicatorsshow the PoE status. After 45 seconds, theservice port indicators automaticallyrestore to the status mode (default).



15


Color Description

6 MODE: modeswitch button

- l When you press this button once, theservice port indicators change to STCKmode and show the stack ID of the localswitch.

l When you press this button a secondtime, the service port indicators changeto PoE mode and show the PoE statusof ports.

l When you press this button a third time,the STAT indicator turns green and theservice port indicators restore to thedefault mode.

If you do not press the MODE buttonwithin 45 seconds, the service portindicators restore to the default mode. Inthis case, the STAT indicator is steadygreen, the PoE indicator is off, and theSTCK indicator is off or blinking green.

7 Service portindicatorl FE electrical

ports: Theports arenumberedfrom bottomto top and leftto right,starting with1.

l GE ports:Each GE porthas anindicatorabove it.

Meanings of service port indicators vary in different modes.For details, see Table 2-6.

Table 2-6 Description of service port indicators in different modes

Display Mode Color Description

Status Off No link has been established to the port orthe port has been shut down.



16


Green l Steady on: A link is established on theport.

l Blinking: The port is sending orreceiving data.

PoE Off The port is not providing power to apowered device (PD).

Green Steady on: The port is providing power toa PD.

Yellow l Steady on: The PoE function isdisabled on the port.

l Blinking: The port stops providing PoEpower because of an exception (forexample, an incompatible PD isconnected to the port).

Green andyellow

Blinking green and yellow alternately:The port cannot provide power to a PD.The possible reasons include:l The power of the PD exceeds the

maximum power or power threshold ofthe port.

l The total power consumption of PDshas reached the maximum power of theswitch.

l The manual power management modeis used and the port is not enabled toprovide power to the PD.

Stack Off Port indicators do not show the stack ID ofthe switch.



17


Green l Steady on:The switch is not the master switch ina stack.

– If the indicator of a port is steady on,the number of this port is the stackID of the switch.

– If the first nine port indicators aresteady on, the stack ID of the switchis 0.

l Blinking:The switch is the master switch in astack.

– If the indicator of a port is blinking,the number of this port is the stackID of the switch.

– If the first nine port indicators areblinking, the stack ID of the switchis 0.

2.3.4 Port Description

10/100BASE-TX Ethernet Electrical PortA 10/100BASE-TX Ethernet electrical port sends and receives service data at 10/100 Mbit/s,and must use 3.3 Network Cable. Table 2-7 lists the attributes of a 10/100BASE-TX Ethernetelectrical port.

Table 2-7 Attributes of a 10/100BASE-TX Ethernet electrical port

Attribute Item

Connector type RJ45

Standardscompliance

IEEE802.3, IEEE802.3u, IEEE802.3ab

Electrical portattributes

MDI/MDIXNOTE

l A medium dependent interface (MDI) provides the physical and electricalconnection to the cabling medium. Ethernet ports of most NICs are MDIs.

l A medium dependent interface crossover (MDIX) enables connectionbetween like devices. MDIX ports are usually used on hubs or LAN switches.



18

Attribute Item

Working mode 10/100 Mbit/s auto-sensingFull-duplex

Maximumtransmissiondistance

100 m

1000BASE-X Ethernet Optical PortA 1000BASE-X Ethernet optical port can send and receive data at only 1000 Mbit/s and cannotwork at 100 Mbit/s. Table 2-8 lists the attributes of a 1000BASE-X Ethernet optical port.

Table 2-8 Attributes of a 1000BASE-X Ethernet optical Port

Attribute Item

Connector type LC/PC

Optical portattributes

Depending on the optical module used (see SFP/eSFP OpticalModule)

Standardscompliance

IEEE802.3z

Working mode 1000 Mbit/sFull-duplex

Combo PortA combo port consists of an optical Ethernet port and an electrical Ethernet port on the panel.Each combo port matches only one internal forwarding port. The electrical and optical ports ofa combo port are multiplexed, and only one of them can work at a time. When one of the Ethernetports is working, the other port is shut down.

NOTE

By default, a combo port works in auto mode, in which the port type is determined as follows:

l If the optical port has no optical module installed and the electrical port has no network cableconnected, the port type depends on which port is connected first. If the electrical port is connectedby a network cable first, the electrical port is used for data switching. If the optical port has an opticalmodule installed first, the optical port is used for data switching.

l If the electrical port has a network cable connected and is in Up state, the electrical port is still usedfor data switching when the optical port has an optical module installed.

l If the optical port, no matter in Up or Down state, has an optical module installed, the optical port isstill used for data switching when the electrical port has a network cable connected.

l If the optical port has an optical module installed and the electrical port has a network cable connected,the optical port is used for data switching after the switch restarts.

You can configure a combo port as an electrical or optical port using the combo-port command.



19

Console PortThe console port of a switch can connect to an operation terminal for onsite configuration. Theport must use 3.5 Console Cable. To configure a switch after the first power-on, log in to theswitch through the console port. Table 2-9 lists attributes of a console port.

Table 2-9 Attributes of a console port

Attribute Item

Connector type RJ45

Standardscompliance

RS-232

Working mode Full-duplex universal asynchronous receiver/transmitter (UART)

Baud rate 9600 bit/s to 115200 bit/sThe default value is 9600 bit/s.

JTAG portFigure 2-8 shows the JTAG port. The JTAG port is an internal port of the switch and is used tocheck and diagnose equipment faults.

Figure 2-8 JTAG port



20

2.3.5 Power Supply Configuration

PoE Power Supply Configuration

In the S2750-EI series, the S2750-20TP-PWR-EI-AC, S2750-28TP-PWR-EI-AC, andS2751-28TP-PWR-EI-AC are PoE models. All the three models use internal AC power modules.The internal power modules of the S2750-20TP-PWR-EI-AC and S2750-28TP-PWR-EI-ACprovide 370 W of PoE power, sufficient for full PoE power supply (IEEE 802.3af) on 16 and24 ports respectively or full PoE+ power supply (IEEE 802.3at) on 12 ports. The internal powermodules of the S2751-28TP-PWR-EI-AC provide 124 W of PoE power, sufficient for full PoEpower supply on 8 ports and full PoE+ power supply on 4 ports.

Figure 2-9 shows the PoE power supply connections on the switches. After AC power istransmitted to the PWR module on the switch, the PWR module provides a channel of 12 Vvoltage and a channel of -53 V voltage. The 12 V voltage is provided for the entire device, andthe -53 V voltage is provided for the PDs.

Figure 2-9 PoE power supply by AC power modules

Motherboard

GND12V

PWR

L N PGND

-53V RTN

L: Live wire N: Neutral wire PGND: Protective groundwire

GND: 12 V referenceground

RTN: -53 V referenceground

Non-PoE Power Supply Configuration

The non-PoE models in the S2750-EI series use internal power modules and do not supportpluggable power modules.

Figure 2-10 shows the power supply connections on the non-PoE models. An internal AC powermodule (PWR) receives power from an external power source and provides a 12 V output to thechassis.



21

Figure 2-10 Power supply by a single AC power module on a non-PoE model

Motherboard

GND12V

PWR

L N PGND

L: Live wire N: Neutral wire PGND: Protective ground wire GND: 12 V reference ground

2.3.6 Heat Dissipation

Table 2-10 lists the heat dissipation methods of the S2750-EI series switches.

Table 2-10 Heat dissipation methods of the S2750-EI series switches

Device Model Heat Dissipation Method

l S2750-28TP-EI-ACl S2751-28TP-PWR-

EI-AC

Natural heat dissipation

l S2750-20TP-PWR-EI-AC

l S2750-28TP-PWR-EI-AC

Forcible heat dissipationThe air flows in from the left and flows out from the right.

MODE

2

CONSOLE

3

4

Cold airHot air

2.3.7 Specifications

Table 2-11 lists specifications of the S2750-EI series switches.

Table 2-11 Specifications of the S2750-EI

Item Description

DDR memory 256 MB

Flash memory 200 MB



22

Item Description

Mean time betweenfailures (MTBF)

l S2750-28TP-EI-AC: 44.3 yearsl S2750-20TP-PWR-EI-AC: 78.68 yearsl S2750-28TP-PWR-EI-AC: 78.29 yearsl S2751-28TP-PWR-EI-AC: 79.94 years

Mean time to repair(MTTR)

2 hours

Availability > 0.99999

Surgeprotection

Serviceportprotection

Common mode: ±6 kV

Powersupplyprotection

l S2750-28TP-EI-AC: ±6 kV in differential mode; ±6 kV in commonmode

l S2750-20TP-PWR-EI-AC: ±6 kV in differential mode; ±6 kV incommon mode

l S2750-28TP-PWR-EI-AC: ±6 kV in differential mode; ±6 kV incommon mode

l S2751-28TP-PWR-EI-AC: ±2kV in differential mode; ±4kV incommon mode

Dimensions (W x Dx H)

l S2750-28TP-EI-AC: 442.0 mm x 220.0 mm x 43.6 mml S2750-20TP-PWR-EI-AC: 442.0 mm x 310.0 mm x 43.6 mml S2750-28TP-PWR-EI-AC: 442.0 mm x 310.0 mm x 43.6 mml S2751-28TP-PWR-EI-AC: 442.0 mm x 310.0 mm x 43.6 mm

Weight ≤ 5 kg

Stack port Two uplink 1000BASE-X optical ports

Maximum stackbandwidth(bidirectional)

10 Gbit/s

RPS Not supported

PoE Supported by PWR models

ACinputvoltage

Ratedvoltagerange

100 V AC to 240 V AC, 50/60 Hz

Maximumvoltagerange

90 V AC to 264 V AC; 47 Hz to 63 Hz



23

Item Description

Maximum powerconsumption (100%throughput, 100%PoE loads, fullspeed of fans)

l S2750-28TP-EI-AC: 15.7 Wl S2750-20TP-PWR-EI-AC: 435 W (power consumption: 65 W;

PoE: 370 W)l S2750-28TP-PWR-EI-AC: 445 W (power consumption: 75 W;

PoE: 370 W)l S2751-28TP-PWR-EI-AC: 147 W (power consumption: 23 W;

PoE: 124 W)

Temperature

Operatingtemperature

-5°C to +50°C (at an altitude of 0 m to 1800 m)NOTE

When the altitude is between 1800 m and 5000 m, the highest operatingtemperature reduces 1°C every time the altitude increases 220 m.

Storagetemperature

-40°C to +70°C

Noise under normaltemperature (27°C,sound power)

l S2750-28TP-EI-AC: 0 (The device has no fans.)l S2750-20TP-PWR-EI-AC: less than 52 dBAl S2750-28TP-PWR-EI-AC: less than 52 dBAl S2751-28TP-PWR-EI-AC: 0 (The device has no fans.)

Relative humidity 5% RH to 95% RH, noncondensing

Operating altitude l S2750-28TP-EI-AC: 0 m to 5000 ml S2750-20TP-PWR-EI-AC: 0 m to 5000 ml S2750-28TP-PWR-EI-AC: 0 m to 5000 ml S2751-28TP-PWR-EI-AC: 0 m to 2000 m

EMC standardscompliance

l CISPR22 Class Al CISPR24l EN55022 Class Al EN50024l ETSI EN 300 386 Class Al CFR 47 FCC Part 15 Class Al ICES 003 Class Al AS/NZS CISPR22 Class Al IEC61000-4-2l ITU-T K 20l ITU-T K 44

Environmentalstandardscompliance

l RoHSl REACHl WEEE



24

Item Description

Safety standardscompliance

l IEC 60950-1l EN 60950-1/A11/A12l UL 60950-1l CSA C22.2 No 60950-1l AS/NZS 60950.1

Laser safetystandardscompliance

l IEC60825-1l IEC60825-2l EN60825-1l EN60825-2



25

3 Cables

About This Chapter

3.1 Ground Cable

3.2 Optical Fiber

3.3 Network Cable

3.4 AC Power Cable

3.5 Console Cable

3.6 High-Speed Cable

S2750 Series Ethernet SwitchesHardware Description 3 Cables


26

3.1 Ground Cable

Appearance and StructureFigure 3-1 shows the appearance of a typical ground cable.

NOTE

Other types of ground cables are similar to the example shown in the figure, except for their cross-sectionalarea, size of the cable lugs, and cable length.

Figure 3-1 Appearance of a ground cable

ConnectionOne end of the ground cable connects to the ground screw on the switch chassis, and the otherend connects to the ground point on the cabinet or ground bar.

3.2 Optical Fiber

Active Optical CableAn active optical cable (AOC) is an optical fiber with optical modules at both ends. AOC cablesare easy to use. Figure 3-2 shows the appearance of an AOC cable.



27

Figure 3-2 Appearance of an AOC cable

Table 3-1 lists models and attributes of AOC cables.

Table 3-1 Attributes of AOC cables

Model Length Bend Radius ConnectorType

OperatingTemperature

SFP-10G-AOC3M

3 m 30 mm SFP+ 0°C to 70°C

SFP-10G-AOC10M

10 m 30 mm

Fiber JumperA fiber jumper consists of a length of a single fiber or multiple fibers with optical connectors atboth ends. The fiber jumper is a fiber patch cable that connects an optical module to a fiberterminal box.

Figure 3-3 shows the appearance of a single-mode LC/PC fiber jumper.



28

Figure 3-3 Appearance of a single-mode LC/PC fiber jumper

Figure 3-4 shows the appearance of a multimode LC/PC fiber jumper.

Figure 3-4 Appearance of amultimode LC/PC fiber jumper

Figure 3-5 shows the appearance of a single-mode SC/PC fiber jumper.



29

Figure 3-5 Appearance of single-mode SC/PC fiber jumper

Select fiber jumpers according to the following rules:

1. Determine the length of fiber jumpers based on the actual cabling distance.2. Determine the fiber type based on the optical module type.

l Use a multimode fiber jumper for a multimode optical module.l Use a single-mode fiber jumper for a single-mode optical module.

3. Determine the optical connector type based on the interface type.Ensure that the optical connector at each end of a fiber jumper is the same type as theinterface connected.

Fiber PigtailA fiber pigtail is an optical fiber that has an optical connector on one end and a length of exposedfiber at the other end. The exposed fiber can be fused to another optical fiber. Fiber pigtails arecommonly used to connect optical fibers to optical fiber modules in fiber terminal boxes.(Couplers and jumpers are also used.) Figure 3-6 shows the structure of a fiber pigtail.



30

Figure 3-6 Structure of a fiber pigtail

Fiber pigtails are classified into single-mode and multimode fiber pigtails and are used for short-distance connections.

Optical Fiber, Optical Connector, and Fiber AdapterOptical Fibers

Optical fibers are classified into single-mode fibers and multimode fibers.

l Single-mode fibers have a diameter of 5-10 um and transmit laser light in one mode witha specified wavelength. These fibers support a wide frequency band and a high transmissioncapacity, so they are used for long-distance transmission. Most single-mode fibers areyellow, as shown in Figure 3-3.

l Multimode fibers have a diameter of 50 um or 62.5 um and transmit laser light in multiplemodes with a specified wavelength. These fibers have a lower transmission capacity thansingle-mode fibers and are used for short-distance transmission. Most multimode fibers areorange, as shown in Figure 3-4.

Optical Connector

Optical connectors are used to connect optical fibers of the same type. Table 3-2 lists commonoptical connectors.

Table 3-2 Common optical connectors

ConnectorType

Optical Connector

Squareconnector

SC/PCconnector

LC/PCconnector

MTRJ/PCconnector

MPO connector

Roundconnector

FC/PCconnector

ST/PCconnector

- -



31

NOTICEWhen connecting or removing a square connector, align the connector with the optical interfaceand do not rotate the fiber. Pay attention to the following points:l To connect a fiber, align the head of the fiber jumper with the optical interface and insert the

optical fiber into the interface gently.l To remove a fiber, press the latch on the connector and pull the fiber out.

Fiber Adapter

A fiber adapter (also called a flange) is a fiber connection component. Fiber adapters are widelyused in optical distribution frames (ODF), fiber transmission equipment, or optical instruments.

3.3 Network Cable

Types of Network CablesA network cable connects a maintenance terminal to the console port on the main control boardfor local or remote maintenance.

Network cables are classified into straight-through cables and crossover cables.

l A straight-through cable connects a terminal, such as a computer or switch, to the network.The straight-through cable uses two RJ45 connectors, which have the same pinout.

l A crossover cable connects two terminals, such as computers or switches. The crossovercable uses two RJ45 connectors, which have different pinouts.

Appearance and StructureNOTE

l Generally, a network cable is a standard unshielded network cable that uses RJ45 connectors.

l The appearances of the straight-through cable and the crossover cable are the same.

Figure 3-7 shows the appearance of a network cable.



32

Figure 3-7 Appearance of a network cable

Figure 3-8 shows the structure of a network cable.

Figure 3-8 Structure of a network cable

X1

81

Main lable

X2

Pin AssignmentsTable 3-3 shows the pin assignments of a straight-through cable.



33

Table 3-3 Pin assignments of a straight-through cable

X1 Pin Wire Color X2 Pin

1 White and orange 1

2 Orange 2

3 White and green 3

4 Blue 4

5 White and blue 5

6 Green 6

7 White and brown 7

8 Brown 8

Table 3-4 shows the pin assignments of a crossover cable.

Table 3-4 Pin assignments of a crossover cable

X1 Pin Wire Color X2 Pin

1 White and orange 3

2 Orange 6

3 White and green 1

4 Blue 4

5 White and blue 5

6 Green 2

7 White and brown 7

8 Brown 8

NOTE

To achieve the best electrical transmission performance, ensure that the wires connected to pins 1 and 2 and topins 3 and 6 are twisted pairs.

3.4 AC Power Cable

Appearance and StructureFigure 3-9 shows the appearance of an AC power cable.



34

Figure 3-9 AC power cable

NOTE

The AC power cables used in different countries and regions may have different specifications. Figure3-9 shows the AC power cable complying with China's national standard. The power cable and plugdelivered with the chassis can only be used on this chassis, and cannot be used on other devices.

ConnectionAn AC power cable connects to the following:

l An AC power input port on the devicel The mains supply

3.5 Console Cable

Appearance and StructureFigure 3-10 and Figure 3-11 show the appearance and structure of a console cable.

Figure 3-10 Appearance of a console cable



35

Figure 3-11 Structure of a console cable

X1Pos.1

Pos.9

Pos.6

Pos.5

X2 1 8

Serial port connector(8-pin, RJ-45)

D-type connector(9-pin, female)

Label

ConnectionA console cable connects the console port of the device to the serial port of an operation terminalto transmit configuration data. A shielded cable or an unshielded cable can be used accordingto the onsite situation.

A console cable connects the device and terminal as follows:

l The 8-pin RJ45 connector is inserted into the console port of the device.l The DB9 connector is inserted into the terminal serial port.

3.6 High-Speed Cable

Types of High-Speed CablesTable 3-5 shows the types of high-speed cables.

Table 3-5 Types of high-speed cables

Model Length Electricalattribute

Bend Radius ConnectorType

SFP-10G-CU1M

1 m Passive 25 mm SFP+

SFP-10G-CU3M

3 m Passive 25 mm SFP+

SFP-10G-AC10M

10 m Active 25 mm SFP+

NOTICEThe two ends of a high-speed cable must be covered by electrostatic discharge (ESD) caps.



36

Appearance and StructureFigure 3-12 shows the appearance of an SFP+ high-speed cable.

Figure 3-12 Appearance of an SFP+ high-speed cable

Figure 3-13 shows the structure of an SFP+ high-speed cable.

Figure 3-13 Structure of an SFP+ high-speed cable

X1X2

Stack DescriptionIn addition to data transmission, high-speed cables can be used for stack connection, as describedin Table 3-6.



37

Table 3-6 Stack description table

StackConnectionMode

Stack Port Stack Cable Rate of a SingleStack Port

Remarks

Stackport

Two SFPports (notcomboports)

l 1 m passiveSFP+ coppercable

l 3 m passiveSFP+ coppercable

l 10 m activeSFP+ coppercable

l 3 m, 10 mAOC cables

l 6GE stackopticalmodule(SFP-6GE-LR) andoptical fiber

2.5 Gbit/s Any models of the S2750-EI series can set up a stack.



38

4 Optical Module

About This Chapter

NOTE

l Optical modules have different encapsulation types, and different interface rates are available for eachencapsulation type.

l Optical module appearances shown in this document are examples only, and the appearance ofdelivered optical modules may differ.

l Use optical modules certified for Huawei switches. Non-certified optical modules cannot ensuretransmission reliability and may affect service stability on the switch. Huawei is not responsible forany problem caused by non-certified optical modules and will not fix such problems.

l All the optical modules listed in the documentation are Huawei certified optical modules.

4.1 Basic Concepts

4.2 SFP/eSFP Modules

S2750 Series Ethernet SwitchesHardware Description 4 Optical Module


39

4.1 Basic Concepts

Appearance and StructureFigure 4-1 shows the appearance of an optical module.

Figure 4-1 Appearance of an optical module

1 3 24

5

8

7

6

1. Handle 2. Receiver 3. Transmitter4. Shell 5. Label 6. Dust cap7. Spring 8. Module connector -



40

Terms

Encapsulation type Encapsulation types of optical modules include SFP, eSFP, SFP+, QSFP+, XFP, asdescribed in Table 4-1.

Table 4-1 Encapsulation types of optical modules

EncapsulationType

Description

SFP Small form-factor pluggable.

eSFP Enhanced small form-factor pluggable. An eSFP module is anSFP module that supports monitoring of voltage, temperature,bias current, transmit optical power, and receive opticalpower. Sometimes, eSFP is called SFP.

SFP+ Small form-factor pluggable plus, which is SFP with a higherrate. SFP+ modules are more sensitive to electromagneticinterference (EMI) because of their higher rate. To reduceEMI, SFP+ modules have more springs than SFP modules andthe cages for SFP+ modules on a card are tighter.

QSFP+ Quad SFP+, four-channel SFP+.

XFP 10-GB small form-factor pluggable transceiver, 10GE opticalmodule. X is the Roman numeral 10, indicating 10G. All XFPmodules are 10G optical modules.

Transmission distance Maximum distance over which optical signals can transmit. Optical signals sent fromdifferent types of sources can transmit over different distances due to negative effects ofoptical fibers, such as dispersion and attenuation.

Interface rate Maximum rate of electrical signals that an optical device can transmit without bit errors.Various interface rates are defined in Ethernet standards, such as 125 Mbit/s, 1.25 Gbit/s, 10.3125 Gbit/s, and 41.25 Gbit/s.

Center wavelength Wavelength measured at the midpoint of the half-amplitude line in the transmit spectrum.

Fiber mode Mode of fibers defining based on core diameters and features of optical fibers. Opticalfibers are classified into single-mode fibers and multi-mode fibers. Generally, multi-mode fibers have large core diameters and severe dispersion, so they transmit opticalsignals over short distances when working with multi-mode optical modules. Single-mode fibers have small dispersion and can transmit optical signals over long distanceswhen working with single-mode optical modules.

Modal bandwidth Bandwidth measured at a point with transmit power several dB lower than that of thepoint with the peak center wavelength. Modal bandwidth reflects spectrumcharacteristics of an optical module.



41

Fiber diameter Diameter of the core of a fiber. According to international standards for optical fibers,the diameter of a multi-mode fiber is 62.5 um or 50 um, and the diameter of a single-mode fiber is 9 um.

Fiber class Optical signals with different wavelengths have their best working windows in differentoptical fibers. To help efficiently adjust wavelengths or dispersion features of opticalfibers and change their refractive indexes, the following classes are defined: multi-modefiber (G.651), common single-mode fiber (G.652), shifted dispersion fiber (G.653), andnon-zero shifted dispersion fiber (G.655). G.651 and G.652 are commonly used fiberclasses.

Connector type Type of the interface on an optical module to accommodate a fiber. Commonly usedconnector types are LC (applicable to all the SFP, SFP+, and XFP modules), MPO(applicable to some of QSFP+ modules), and SC.

Transmit optical power Output optical power of an optical module when it is working properly.

Maximum receiversensitivity

Minimum average input optical power that the receiver of an optical module can receivewithin a range of bit error rate (BER = 10-12).

Overload optical power Maximum average input optical power that the receiver of an optical module can receivewithin a range of bit error rate (BER = 10-12).

Extinction ratio Minimum ratio of the average optical power with signals transmitted against the averageoptical power without signals transmitted in complete modulation mode. The extinctionratio indicates the capability of an optical module to identify signal 0 and signal 1.

4.2 SFP/eSFP Modules

AppearanceFigure 4-2 shows an SFP/eSFP optical module.



42

Figure 4-2 SFP/eSFP optical module

Figure 4-3 shows a GE SFP copper module.

Figure 4-3 Appearance of a GE SFP copper module

FE Optical ModuleTable 4-2 and Table 4-3 list the attributes of an FE optical module.



43

Table 4-2 Attributes of FE optical modules

Model TransmissionDistance(km)

Standard

Fiber Type

SFP-FE-SX-MM1310(SFP optical module)

≤ 2 100base-FX

l Fiber mode: multimodel Core diameter: 50 μm or 62.5

μml Connector type: LC

eSFP-FE-LX-SM1310 ≤ 15 100base-LX

l Fiber mode: single-model Connector type: LC

S-SFP-FE-LH40-SM1310 ≤ 40 100base-LX

S-SFP-FE-LH80-SM1550 ≤ 80 100base-LX

SFP-FE-LX-SM1310-BIDI(Bidirectional opticalmodule)

≤ 15 100base-BX


≤ 15 100base-BX



44

Table 4-3 Optical parameters of FE optical modules

Model CenterWavelength (nm)

Transmit Power(dBm)

ReceiverSensitivity (dBm)

OverloadOpticalPower(dBm)

Extinction Ratio(dB)

SFP-FE-SX-MM1310(SFP optical module)

1310 -19.0 to-14.0

≤ -30.0 -14.0 ≥ 10

eSFP-FE-LX-SM1310 1310 -15.0 to-8.0

≤ -31.0 -8.0 ≥ 8.2

S-SFP-FE-LH40-SM1310 1310 -5.0 to 0 ≤ -37.0 -10.0 ≥ 10.5

S-SFP-FE-LH80-SM1550 1550 -5.0 to 0 ≤ -37.0 -10.0 ≥ 10.5


RX1550/TX1310

-15.0 to-8.0

≤ -32.0 -8.0 ≥ 8.5


TX1550/RX1310

-15.0 to-8.0

≤ -32.0 -8.0 ≥ 8.5

GE Optical ModuleTable 4-4 and Table 4-5 list the attributes of a GE optical module.

Table 4-4 Attributes of GE optical modules


Standard Fiber Type

eSFP-GE-SX-MM850 ≤ 0.22 1000base-SX

l Fiber mode: multimodel Pattern bandwidth: 160

MHz*kml Core diameter: 62.5 μml Connector type: LC

≤ 0.275 1000base-SX

l Fiber mode: multimode (OM1)l Connector type: LC



45


Standard Fiber Type

≤ 0.5 1000base-SX

l Fiber mode: multimodel Pattern bandwidth: 400

MHz*kml Core diameter: 50 μml Connector type: LC

≤ 0.55 1000base-SX


≤ 1 1000base-SX


SFP-GE-LX-SM1310 ≤ 10 1000base-LX/LH

l Fiber mode: single-model Connector type: LC

S-SFP-GE-LH40-SM1310 ≤ 40 1000base-LX/LH

S-SFP-GE-LH40-SM1550 ≤ 40 1000base-LX/LH

S-SFP-GE-LH80-SM1550 ≤ 80 1000base-ZX

eSFP-GE-ZX100-SM1550 ≤ 100 1000base-ZX

SFP-GE-LX-SM1310-BIDI(Bidirectional opticalmodule)

≤ 10 1000base-BX


≤ 10 1000base-BX

LE2MGSC40DE0(Bidirectional opticalmodule)

≤ 40 1000base-BX

LE2MGSC40ED0(Bidirectional opticalmodule)

≤ 40 1000base-BX

SFP-GE-BXU1-SC(Bidirectional opticalmodule)

≤ 10 1000base-BX

l Fiber mode: single-model Connector type: SC



46

Table 4-5 Optical parameters of GE optical modules

Model CenterWavelength (nm)

Transmit Power(dBm)

ReceiverSensitivity (dBm)


ExtinctionRatio(dB)

eSFP-GE-SX-MM850 850 -9.5 to-2.5

≤ -17.0 0 ≥ 9

SFP-GE-LX-SM1310 1310 -9.0 to-3.0

≤ -20.0 -3.0 ≥ 9

S-SFP-GE-LH40-SM1310 1310 -5.0 to 0 ≤ -23 -3.0 ≥ 9

S-SFP-GE-LH40-SM1550 1550 -5.0 to 0 ≤ -22 -3.0 ≥ 8.5

S-SFP-GE-LH80-SM1550 1550 -2.0 to 5.0 ≤ -23.0 -3.0 ≥ 9

eSFP-GE-ZX100-SM1550 1550 0 to 5 ≤ -30.0 -9.0 ≥ 9


RX1490/TX1310

-9.0 to-3.0

≤ -19.5 -3.0 ≥ 6


RX1310/TX1490

-9.0 to-3.0

≤ -19.5 -3.0 ≥ 6

LE2MGSC40DE0(Bidirectional opticalmodule)

RX1490/TX1310

-2.0 to 3.0 ≤ -23 -3.0 ≥ 9

LE2MGSC40ED0(Bidirectional opticalmodule)

RX1310/TX1490

-2.0 to 3.0 ≤ -23 -3.0 ≥ 9

SFP-GE-BXU1-SC(Bidirectional opticalmodule)

RX1310/TX1490

-9.0 to-3.0

≤ -19.5 -3.0 ≥ 9

GE-CWDM Optical ModuleTable 4-6 lists the attributes of a GE coarse wavelength division multiplexing (CWDM) opticalmodule.



47

Table 4-6 Attributes of CWDM optical modules

CenterWavelength (nm),Model

1471, CWDM-SFPGE-1471








Specifications

Encapsulation type: eSFP

Transmission distance: ≤ 80 km

Fiber type: single-mode, LC

Standard: CWDM

Operating temperature: 0°C to 70°CNOTE

The operating temperature cannot exceed 45°C when CWDM optical modules are usedon the S2750-28TP-EI-AC.

l Transmit power: 0 dBm to 5.0 dBm

l Receiver sensitivity: ≤ -28.0 dBml Overload optical power: -9.0 dBm

l Extinction ratio: ≥ 8.5 dB

NOTE

The appearance of CWDM and DWDM optical modules is similar to that of common optical modules.These optical modules are distinguished by their labels. In practice, the corresponding optical fibers arelabeled to distinguish the optical modules.

GE-DWDM Optical ModuleTable 4-7 lists the attributes of a GE dense wavelength division multiplexing (DWDM) opticalmodule.

Table 4-7 Attributes of DWDM optical modules

CenterWavelength(nm),Model

1529.55,DWDM-SFPGE-1529-55

1530.33,DWDM-SFPGE-1530-33

1531.12,DWDM-SFPGE-1531-12

1531.90,DWDM-SFPGE-1531-90

1532.68,DWDM-SFPGE-1532-68

1533.47,DWDM-SFPGE-1533-47

1534.25,DWDM-SFPGE-1534-25

1535.04,DWDM-SFPGE-1535-04

1535.82,DWDM-SFPGE-1535-82

1536.61,DWDM-SFPGE-1536-61



48

1537.40,DWDM-SFPGE-1537-40

1538.19,DWDM-SFPGE-1538-19

1538.98,DWDM-SFPGE-1538-98

1539.77,DWDM-SFPGE-1539-77

1540.56,DWDM-SFPGE-1540-56

1541.35,DWDM-SFPGE-1541-35

1542.14,DWDM-SFPGE-1542-14

1542.94,DWDM-SFPGE-1542-94

1543.73,DWDM-SFPGE-1543-73

1544.53,DWDM-SFPGE-1544-53

1545.32,DWDM-SFPGE-1545-32

1546.12,DWDM-SFPGE-1546-12

1546.92,DWDM-SFPGE-1546-92

1547.72,DWDM-SFPGE-1547-72

1548.51,DWDM-SFPGE-1548-51

1549.32,DWDM-SFPGE-1549-32

1550.12,DWDM-SFPGE-1550-12

1550.92,DWDM-SFPGE-1550-92

1551.72,DWDM-SFPGE-1551-72

1552.52,DWDM-SFPGE-1552-52

1553.33,DWDM-SFPGE-1553-33

1554.13,DWDM-SFPGE-1554-13

1554.94,DWDM-SFPGE-1554-94

1555.75,DWDM-SFPGE-1555-75

1556.55,DWDM-SFPGE-1556-55

1557.36,DWDM-SFPGE-1557-36

1558.17,DWDM-SFPGE-1558-17

1558.98,DWDM-SFPGE-1558-98

1559.79,DWDM-SFPGE-1559-79

1560.61,DWDM-SFPGE-1560-61

Specifications

Encapsulation type: eSFP

Transmission distance: ≤ 120 km

Fiber type: single-mode, LC

Standard: DWDM

Operating temperature: 0°C to 70°CNOTE

The operating temperature cannot exceed 45°C when DWDM optical modules are used on theS2750-28TP-EI-AC.

l Transmit power: 0 dBm to 4.0 dBm

l Receiver sensitivity: ≤ -28.0 dBml Overload optical power: -8.0 dBm

l Extinction ratio: ≥ 8.2 dB

GE SFP Copper ModuleTable 4-8 lists the attributes of a GE SFP copper module.



49

Table 4-8 Attributes of a GE SFP copper module

Model TransmissionDistance (km)

Connector Type Standard

SFP-1000BaseT ≤ 0.1 RJ45 1000Base-T

Stack Optical ModuleS2750-EI switches can be connected through stack optical modules and optical fibers to set upa stack over a long distance. Table 4-9 lists the attributes of a stack optical module.

Table 4-9 Attributes of a stack optical module

model

TransmissionDistance(km)

CenterWavelength(nm)

TransmitPower(dBm)

ReceiverSensitivity(dBm)


Extinction Ratio(dB)

Fiber Type

SFP-6GE-LR

2 1310 -8.4 to0.5

-13.8 0.5 ≥ 3.5 l Fiber mode:single-mode

l Connector type:LC



50

Date post:	20-May-2018
Category:	Documents
Upload:	dinhnhu
View:	217 times
Download:	0 times

Hardware Description - Huawei - Building A Better ... document provides an overall description of...

Documents