Yealink SIP-T5 Series Administrator's Manual page 307

DNSTTL on the registered server expires, the phone will retry to send requests to the primary server.
2-Registration: the phone will send requests to the last registered server first. If the registration
expires, the phone will retry to send requests to the primary server.
3-duration: the phone will send requests to the last registered server first. If the time defined by the
"account.X.sip_server.Y.failback_timeout" parameter expires, the phone will retry to send requests to
the primary server.
Default 0
Parameter account.X.sip_server.Y.failback_timeout
It configures the timeout (in seconds) for the 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 phone will not send requests to the primary server until a failover
Description
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).
Permitted
0, Integer from 60 to 65535
Values
Default 3600
Parameter account.X.sip_server.Y.failback_subscribe.enable
It enables or disables the phone to retry to re-subscribe after registering to the secondary server with
different IP addresses when encountering a failover.
Description
Note: It works only if "account.X.sip_server.Y.failback_mode" is set to 1, 2 or 3.
0-Disabled
Permitted
1-Enabled, the phone will immediately re-subscribe to the secondary server, for ensuring the normal
Values
use of the features associated with the subscription (for example, BLF, SCA).
Default
0
Parameter account.X.outbound_proxy.Y.register_on_enable
It enables or disables the phone to register to the secondary outbound proxy server before sending
Description
requests to it when encountering a failover.
0-Disabled, the 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 inform-
Permitted
ation. So the phone will directly send the requests to the secondary outbound proxy server.
Values
1-Enabled, the phone will register to the secondary outbound proxy server first, and then send the
requests to it.
Default -1, the phone will invoke "account.X.sip_server.Y.register_on_enable" to take effect.
Parameter account.X.outbound_proxy.Y.retry_counts
It configures the retry times for the phone to resend requests when the outbound proxy server Y is
unavailable or there is no response from the outbound proxy server Y.
Description
The phone moves to the next available outbound proxy server after three failed attempts.
Permitted
Integer from 0 to 20
Values
Default -1, the phone will invoke "account.X.sip_server.Y.retry_counts" to take effect.
Parameter account.X.outbound_proxy.Y.only_signal_with_registered
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Account Settings
<MAC>.cfg
<MAC>.cfg
<MAC>.cfg
<MAC>.cfg
<MAC>.cfg
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