© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-1

Accommodating Voice and Video in Campus Networks

Planning for Support of Voice and Video in a Campus Network

© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-2

Unified Communications

Components of Unified Communications IP phones Call agent (Cisco Unified

Communications Manager) Voice Gateways to PSTN Application server (voice

mail) Conference station (voice and

video) IP network (router and

switches)

© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-3

IP Telephony Components

© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-4

Characteristics of Voice and Data

© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-5

Video Applications

Video collaboration

Cisco TelePresence

IP surveillance

Digital media systems

Characteristics of video applications Most are interactive Video contains voice as well Requires a connection with little delay to prevent

jitter (same as with voice) Requires a high-bandwidth connection depending

on the video resolution Peer-to-peer traffic Video endpoints are connected to the access layer

© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-6

Voice and Video Traffic

© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-7

Requirements for Voice, Data, and Video Traffic

Requirements Voice traffic Data traffic Video traffic

Bandwidth Low High High

Delay Short Mostly no problem

Constant or short

Jitter Little Mostly no problem Little

Packet loss Little Mostly no problem Little

Availability High High Medium

Power Yes None None

Security Medium High Low or medium

Provisioning Management High (DHCP) Medium

(DHCP) Medium

© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-8

Voice and Video in the Campus Network

© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-9

Summary

IP phones, call agent, and application servers are used for unified communications.

Voice sends a constant data stream while data traffic sends changing amounts of data (bursts).

Video applications increase bandwidth requirements in the network.

Video collaboration, digital media systems, and IP surveillance are emerging video applications.

© 2009 Cisco Systems, Inc. All rights reserved. SWITCH v1.0—8-10