Operation Manual

Configuring SIP, SPCP, and NAT
Configuring SIP
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 120
4
Configuring a SIP Proxy Server
To configure SIP proxy and registration parameters, navigate to Admin Login >
advanced > Voice > Ext_n. Under Proxy and Registration, configure the following
fields:
Parameter Description
Proxy SIP proxy server and port number set by the
service provider for all outbound requests. For
example: 192.168.2.100:6060.
The port number is optional. The default is port
5060.
Use Outbound Proxy The 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. When set to no, the
Outbound Proxy and Use OB Proxy in Dialog
parameters are ignored. Defaults to no.
Optionally, the proxy can be configured
(Cisco SPA300 or 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.co
m:5060:p=1:w=50|node2.sip.server.com:5
060:p=2:w=50
For A Record:
sip.server.com:A=172.20.2.1,172.20.2.2
In both examples Use DNS SRV to no and DNS
SRV Auto Prefix are set to no.
Outbound Proxy All outbound requests are sent as the first hop.
Enter an IP address or domain name.
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