Yealink SIP-T21 E2 Administrator's Guide

Configuring Advanced Features
755
Parameters
Permitted Values
Default
information. So the IP phone will directly send the requests to the secondary server.
If it is set to 1 (Enabled), the IP phone will register to the secondary server first, and then
send the requests to it.
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)
Web User Interface:
None
Phone User Interface:
None
account.X.sip_server.Y.only_signal_with_registered
(X ranges from 1 to 16, Y ranges from 1 to 2)
0 or 1
0
Description:
Enables or disables the IP phone to only send requests to the registered server for account
X when encountering a failover.
0-Disabled
1-Enabled
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.sip_server.Y.register_on_enable”
is set to 1 (Enabled) and the value of the parameter “account.X.sip_server.Y.failback_mode”
is set to 1, 2 or 3.
Web User Interface:
None
Phone User Interface:
None
account.X.sip_server.Y.invite_retry_counts
Integer from 1 to
3

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English