Yealink SIP-T2 Series Administrator's Manual page 217

The IP phone moves to the next available outbound proxy server after three failed attempts.
Permitted
Integer from 0 to 20
Values
Default -1, the IP phone will invoke "account.X.sip_server.Y.retry_counts" to take effect.
account.X.outbound_proxy.Y.only_signal_with_
Parameter
[1][2]
registered
It enables or disables the IP phone to only send requests to the registered outbound proxy server when
encountering a failover.
Description
Note: It works only if "account.X.outbound_proxy.Y.register_on_enable" is set to 1 (Enabled) and "accoun-
t.X.outbound_proxy.Y.failback_mode" is set to 1, 2 or 3.
Permitted
0-Disabled
1-Enabled
Values
Default -1, the IP phone will invoke "account.X.sip_server.Y.only_signal_with_registered" to take effect.
account.X.outbound_proxy.Y.invite_retry_counts
Parameter
[2]
It configures the number of retries attempted before sending requests to the next available outbound
Description
proxy server when encountering a failover.
Permitted
Integer from 1 to 10
Values
Default -1, the IP phone will invoke "account.X.sip_server.Y.invite_retry_counts" to take effect.
Parameter account.X.outbound_proxy.Y.failback_mode
It configures the failback mode for the IP phone to retry the primary outbound proxy server in failover.
Description
Note: DNSTTL, Registration and duration mode can only be processed when the IP phone is idle (that is,
no incoming/outbound calls, no active calls or meetings, etc.).
0-newRequests: all requests are sent to the primary outbound proxy server first, regardless of the last
server that was used. If the primary outbound proxy server does not respond correctly, the IP phone will
try to send requests to the secondary outbound proxy server.
1-DNSTTL: the IP phone will send requests to the last registered outbound proxy server first. If the TTL for
the DNS A records on the registered outbound proxy server expires, the phone will retry to send requests
Permitted
to the primary outbound proxy server.
Values
2-Registration: the IP phone will send requests to the last registered outbound proxy server first. If the
registration expires, the phone will retry to send requests to the primary outbound proxy server.
3-duration: the IP phone will send requests to the last registered outbound proxy server first. If the time
defined by the parameter "account.X.outbound_proxy.Y.failback_timeout" expires, the phone will retry to
send requests to the primary outbound proxy server.
Default -1, the IP phone will invoke "account.X.sip_server.Y.failback_mode" to take effect.
Parameter account.X.outbound_proxy.Y.failback_timeout
It configures the timeout (in seconds) for the phone to retry to send requests to the primary outbound
proxy server after failing over to the current working server.
Description If you set the parameter to 0, the IP phone will not send requests to the primary outbound proxy server
until a failover event occurs with the current working server.
Note: It works only if "account.X.outbound_proxy.Y.failback_mode" is set to 3 (duration).
<MAC>.cfg
[1]
<MAC>.cfg
[1][2]
<MAC>.cfg
[1][2]
<MAC>.cfg
Account Settings
211