Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
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account.X.sip_server.Y.failback_timeout
[1][2]
It configures the timeout (in seconds) for the IP phone to retry to send requests to the
primary server after failing over to the current working server.
If you set the parameter to 0, the IP phone will not send requests to the primary server
until a failover event occurs with the current working server.
If you set the parameter between 1 and 59, the timeout will be 60 seconds.
Note: It works only if ““account.X.sip_server.Y.failback_mode” is set to 3 (duration).
0, Integer from 60 to 65535
account.X.sip_server.Y.failback_subscribe.enable
[1][2]
It enables or disables the IP phone to retry to re-subscribe after registering to the
secondary server with different IP addresses when encountering a failover.
Note: It works only if "account.X.sip_server.Y.failback_mode" is set to 1, 2 or 3.
0-Disabled
1-Enabled, the IP phone will immediately re-subscribe to the secondary server, for
ensuring the normal use of the features associated with subscription (for example, BLF,
SCA).
account.X.outbound_proxy.Y.register_on_enable
[1][2]
It enables or disables the IP phone to register to the secondary outbound proxy server
before sending requests to it when encountering a failover.
0-Disabled, the IP phone will not attempt to register to the secondary outbound proxy
server, since the phone assumes that the primary and secondary outbound proxy
servers share registration information. So the IP phone will directly send the requests
to the secondary outbound proxy server.
1-Enabled, the IP phone will register to the secondary outbound proxy server first, and
then send the requests to it.
-1, the IP phone will invoke “account.X.sip_server.Y.register_on_enable” to take effect.
account.X.outbound_proxy.Y.retry_counts
[1][2]
It configures the retry times for the IP phone to resend requests when the outbound
proxy server Y is unavailable or there is no response from the outbound proxy server
Y.
Example:
account.1.outbound_proxy.1.retry_counts = 3
The IP phone moves to the next available outbound proxy server after three failed
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