Matrix Sparsh VP110 User Manual page 271

• If the primary server does not respond correctly to the INVITE, then tries to make the call using the
secondary server.
• If the secondary server is also unavailable, the IP phone will try the fallback server until it either succeeds
in making a call or exhausts all servers at which point the call will fail.
At the start of a call, server availability is determined by SIP signaling failure. SIP signaling failure depends on the
SIP protocol being used as described below:
• If TCP is used, then the signaling fails if the connection or the send fails.
• If UDP is used, then the signaling fails if ICMP is detected or if the signal times out. If the signaling has
been attempted through all servers in the list and this is the last server, then the signaling fails after the
complete UDP time-out defined in RFC 3261. If it is not the last server in the list, the maximum number of
retries depends on the configured retry count.
Procedure
Server redundancy can be configured using the configuration files or locally.
Configuration File
Local
Matrix SPARSH VP110 User Guide
<MAC>.cfg
Web User Interface
Configure the transport type on the IP
phone.
For more information, refer
"Appendix D ‐ Configuration
Parameters".
Configure the transport type on the IP
phone.
Navigate to:
http://<phoneIPAddress>/
servlet?p=account‐
register&q=load&acc=0
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