S8700 IP connect
Issue 3.4.1 June 2005
345
Provisioning Network Regions
Network regions are Communication Manager constructs for selecting codecs and for grouping
resources by location or network topology. When determining MedPro resources, for example,
Communication Manager will try to select them in the same network region as the IP Telephone
attempting to use them. In addition, codec sets are negotiated by endpoints based on whether
they are in the same or different network regions. It is common to specify G.711 operation within
a network region and G.729 between regions. For voice quality reasons, then, it is advisable to
never have a network region extend across a WAN connection. Thus, when deploying an
IP-Connect system, it is common to have one network region for the central headquarters
location and separate network regions for each remote branch office. MedPros should be
configured for whichever network region in which they are physically located. This concept
applies to VoIP resources on the G700 media gateways, as well. The IP Telephony resources in
a G700 deployed in a branch office should be configured for the network region of the remote
branch office, and not the network region of the MedPros located in headquarters.
QoS
Because G650s can be separated from S8700s by a WAN link, and because network issues
affect G650 stability, it is important to properly enable QoS, specifically DiffServ. QoS is most
important across WAN links, but may be important in LAN environments, as well. If a network
has already been configured for DiffServ, Avaya servers and gateways can utilize the policy
already existing on the network.
Recommendations for QoS DiffServ
If the network has not already been configured for DiffServ, Avaya recommends keeping the
policy simple: set the DiffServ Code Point (DSCP) to 46 (Expedited Forwarding, or EF) for
control, signaling, and voice bearer traffic. Use CBQ or strict priority queuing (with IP Telephony
traffic inserted into the highest priority queue) to offer the appropriate level of service.
Security
Because the S8700 servers have modems for Avaya services access, it is advisable to use an
external firewall or router access-lists to filter traffic to and from the S8700 servers.
Access list
lists port ranges used by Avaya products, and can be used to harden a VoIP system.
Summary of Contents for Application Solutions
Page 1: ...Avaya Application Solutions IP Telephony Deployment Guide 555 245 600 Issue 3 4 1 June 2005 ...
Page 20: ...About This Book 20 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 21: ...Issue 3 4 1 June 2005 21 Section 1 Avaya Application Solutions product guide ...
Page 22: ...22 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 106: ...Call processing 106 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 124: ...Avaya LAN switching products 124 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 139: ...Issue 3 4 1 June 2005 139 Section 2 Deploying IP Telephony ...
Page 140: ...140 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 186: ...Traffic engineering 186 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 204: ...Security 204 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 228: ...Avaya Integrated Management 228 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 274: ...Reliability and Recovery 274 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 275: ...Issue 3 4 1 June 2005 275 Section 3 Getting the IP network ready for telephony ...
Page 276: ...276 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 356: ...Network recovery 356 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 366: ...Network assessment offer 366 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 367: ...Issue 3 4 1 June 2005 367 Appendixes ...
Page 368: ...Appendixes 368 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 394: ...Access list 394 Avaya Application Solutions IP Telephony Deployment Guide ...
Page 414: ...DHCP TFTP 414 Avaya Application Solutions IP Telephony Deployment Guide ...