Yealink SIP-T54S Administrator's Manual page 784

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
0-Concurrent Registration
1-Successive Registration
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)
Note: It is not applicable to outbound proxy servers.
Web User Interface:
None
Phone User Interface:
None
account.X.fallback.timeout
Description:
Configures the time interval (in seconds) for the IP phone to detect whether the working
server is available by sending the registration request for account X after the fallback server
takes over call control.
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)
Note: It works only if the value of the parameter "account.X.fallback.redundancy_type" is set
to 1 (Successive Registration). It is not applicable to outbound proxy servers.
Web User Interface:
None
Phone User Interface:
None
account.X.outbound_proxy_fallback_interval
Description:
758
Parameters Permitted Values
Integer from 10 to
2147483647
Integer from 0 to
65535
Default
120
3600