Cisco 521SG - Unified IP Phone VoIP Administration Manual page 305

Cisco SPA IP Phone Field Reference
Ext Tab
Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide
Parameter
DNS SRV Auto Prefix
Proxy Fallback Intvl
Proxy Redundancy
Method
Description
If enabled, the phone will automatically prepend the
Proxy or Outbound Proxy name with _sip._udp when
performing a DNS SRV lookup on that name.
Defaults to no.
This parameter sets the delay (sec) after which the
phone will retry from the highest priority proxy (or
outbound proxy) servers after it has failed over to a
lower priority server. This parameter is useful only if
the primary and backup proxy server list is provided to
the phone via DNS SRV record lookup on the server
name. (Using multiple DNS A record per server name
does not allow the notion of priority and so all hosts
will be considered at the same priority and the phone
will not attempt to fall back after a fail over).
Defaults to 3600
Select Normal or Based on SRV port. The phone
creates an internal list of proxies returned in the DNS
SRV records.
If you select Normal, the list contains proxies ranked by
weight and priority.
If you select Based on SRV, the phone uses normal,
then inspects the port number based on the first listed
proxy port.
Defaults to Normal.
A
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