Voice & Data ConvergenceVoice & Data Convergence

Network ServicesJanuary 11, 2001

PSTN = Public Switched Telephone Network

Although the PSTN is effective and does a good job at what it was built to do (switch voice calls), many businesses are striving to change it to a new network whereby voice rides on top of a data network.

Drawbacks to the PSTN

Data has overtaken voice as the primary traffic on many networks built for voice.

The PSTN cannot create and deploy features quickly enough. Only the venders of the equipment could develop the applications for that equipment.

Data, Voice, & Video cannot converge on the inflexible PSTN as currently built.

Wasted bandwidth using a 64k connection.

VoIP = Voice over IP

Provides an advanced digital communications network that bypasses the traditional public switched telephone system and uses the Internet to transmit voice communication.

VoIP Signaling Protocol

H.323 - ITU standard for transmitting audio video and data across an IP network.

IP Telephony

IP Telephony is the technology which allows for data, voice, and video to be transmitted over a single, IP based network infrastructure.

IP Telephony Pilot Project

In the 4th Q 2000, Network Services, in cooperation with Telecommunications and OIR have begun to implement IP Telephony on the UF campus. Cisco’s AVVID (Architecture for Voice, Video and Integrated Data) family of products were chosen because of their scalability and availability in the current market.

MCS-7835 Call Mgr. Telecomm

MCS-7835 Call Mgr. NERDC

MCS-7835 Call Mgr. OIR

7960

7960 DDF/CETS

7960

7960

C3524-PWR

C3524-PWR

C3524-PWR

C3524-PWR

PSTN Service

CI SCO V G200V OICE GATEWAY

P OWER RP S ACTI VITY

VG200

Analog Gtwy -4

Analog Gtwy -4

UF Campus Core

UF AVVID Campus Pilot

PRI(future)

Key Benefits

Lower Total Cost of Ownership:– reduced PSTN circuits– reduced long distance– reduced operational costs (MAC)– unified MIS for voice & data

Key Benefits (cont’d)

Next generation business applications:

Unified messagingintegrated email, voice mail, fax

Web-Telephony Integration / CTI

push / pull technologytelecommuting / tele-learning

The Next Steps

Rollout phones to test sites

H.323 Gateway to PSTN

Call Manager Clustering

Unified Messaging

Cisco IP Phone Model 7960 Executive set:

– 6 programmable line /feature

– 4 interactive soft keys:• Messages• Directory• Help• Settings• Services

– graphic capability

Cisco Call Manager

Administration– phone / user setup– features:

• caller id• call forwarding• call park / hold• DID / DOD• Distinctive ring• Call Detail Records• Etc.

VoIP Issues

Call Management– cost accounting– cost modeling / production pricing– admin policy– dial plan

VoIP Issues (continued) QoS

– bandwidth limitations– Traffic Shaping (control the usage)– delay– jitter– packet loss

VoIP Issues (continued)

Wireless Applications Open Interoperability

– standards development Security

– 911, E-911– network– policy

Credits:

• Cisco Systems, Inc.

• Telecommunications, UF.

• Network Services, UF