Proxy And Registration - Cisco 521SG - Unified IP Phone VoIP Administration Manual

Cisco SPA IP Phone Field Reference
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Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide

Proxy and Registration

Parameter
Proxy
Outbound Proxy
Use Outbound Proxy
Description
SIP proxy server and port number set by the Service
Provider for all outbound requests. For example:
192. 1 68.2. 1 00:6060.
SIP Outbound Proxy Server where all outbound
requests are sent as the first hop.
Enables an outbound proxy (for example,
172.20.2. 1 :5060—port is optional) or a domain name
such as sip.server.com as long as this name is a fully-
qualified domain name. If set to no, the Outbound
Proxy and Use OB Proxy in Dialog fields are ignored.
Defaults to no.
Optionally, the proxy can be configured (Cisco SPA500
Series only) for Survivable Remote Site Telephony
(SRST) support. The proxy is configured with an
extension that includes a statically-configured DNS
SRV record or DNS A record. Configuring the proxy
allows for failover and fallback functionality with a
secondary proxy server. For example:
For SRV Record:
sip.server.com:SRV=node1.sip.server.com
:5060:p=1:w=50|node2.sip.server.com:506
0:p=2:w=50
Set Use DNS SRV to no and DNS SRV Auto Prefix to
no.
For A Record:
sip.server.com:A=172.20.2.1,172.20.2.2
Set Use DNS SRV to no and DNS SRV Auto Prefix to
no.
A
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