Yealink SIP-T54S Administrator's Manual page 780

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
X is equal to 1 (for SIP-T19(P) E2/CP860/CP920)
Example:
account.1.sip_server.1.expires = 3600
Web User Interface:
Account->Register->SIP Server Y->Server Expires
Phone User Interface:
None
account.X.sip_server.Y.retry_counts
(X ranges from 1 to 16, Y ranges from 1 to 2)
Description:
Configures the retry times for the IP phone to resend requests when the SIP server Y is
unavailable or there is no response from the SIP server Y for account X.
X ranges from 1 to 16 (for SIP-T54S/T48G/T48S/T46G/T46S/T29G)
X ranges from 1 to 12 (for SIP-T52S/T42G/T42S)
X ranges from 1 to 6 (for SIP-T41P/T41S/T27P/T27G)
X ranges from 1 to 3 (for SIP-T40P/T40G/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
X is equal to 1 (for SIP-T19(P) E2/CP860/CP920)
Example:
account.1.sip_server.1.retry_counts= 3
The IP phone moves to the next available server after three failed attempts.
Web User Interface:
Account->Register->SIP Server Y->Server Retry Counts
Phone User Interface:
None
account.X.sip_server.Y.register_on_enable
(X ranges from 1 to 16, Y ranges from 1 to 2)
Description:
Enables or disables the IP phone to register to the secondary server before sending
requests to it for account X when encountering a failover.
0-Disabled
1-Enabled
If it is set to 0 (Disabled), the IP phone won't attempt to register to the secondary server,
since the phone assumes that the primary and secondary servers share registration
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Parameters Permitted Values Default
Integer from 0 to
20
0 or 1
3
0