Polycom 1725-11530-310 사용자 설명서

 Configuring Your System

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Two types of redundancy are possible:

• Fail-over: In this mode, the full phone system functionality is preserved by 

having a second equivalent capability call server take over from the one 

that has gone down/off-line. This mode of operation should be done 

using DNS mechanisms or “IP Address Moving” from the primary to the 

back-up server. 

• Fallback: In this mode, a second less featured call server (router or 

gateway device) with SIP capability takes over call control to provide basic 

calling capability, but without some of the richer features offered by the 

primary call server (for example, shared lines, presence, and Message 

Waiting Indicator). Polycom phones support configuration of multiple 

servers per SIP registration for this purpose.

In some cases, a combination of the two may be deployed.

http://www.polycom.com/usa/en/support/voice/soundpoint_ip/VoIP_T

echnical_Bulletins_pub.html

 .

Configuration changes can performed centrally at the boot server:

If a DNS name is given for a proxy/registrar address, the IP address(es) 

associated with that name will be discovered as specified in RFC 3263. If a port 

is given, the only lookup will be an A record. If no port is given, NAPTR and 

Your SIP server provider should be consulted for recommended methods of 
configuring phones and servers for fail-over configuration.

Prior to SIP 2.1, the reg.x.server.y parameters (refer to 

 on 

page 

) could be used for fail-over configuration. The older behavior is no 

longer supported. Customers that are using the reg.x.server.y. configuration 
parameters where y>=2 should take care to ensure that their current deployments 
are not adversely affected. For example the phone will only support advanced SIP 
features such as shared lines, missed calls, presence with the primary server (y=1).

Configuration file: 
sip.cfg

Specify global primary and fallback server configuration parameters.

For more information, refer to 

 on page 

Configuration file: 
phone1.cfg

Specify per registration primary and fallback server configuration 
parameters values that override those in sip.cfg.  

For more information, refer to 

 on page