Yealink SIP-T54S Administrator's Manual page 412

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
Procedure
Auto answer can be configured using the following methods.
Central
Provisioning
(Configuration
File)
Web User Interface
386
Configure auto answer and auto answer
mute for SIP account X.
Parameter:
account.X.auto_answer
account.X.auto_answer_mute_enable
<MAC>.cfg
Configure auto answer and auto answer
mute for PSTN account X.
Parameters:
pstn.account.X.auto_answer
pstn.account.X.auto_answer_mute_enable
Specify a period of delay time for auto
answer.
Parameter:
features.auto_answer_delay
Configure auto answer tone.
Parameter:
features.auto_answer_tone.enable
<y0000000000xx>.c
Configure auto answer mute.
fg
Parameter:
features.mute.autoanswer_mute.enable
Configure the IP phone whether to handle
the incoming call arriving when the phone is
in another call or is dialing like a normal call.
Parameter:
features.auto_answer.first_call_only
Configure auto answer and auto answer
mute.
Navigate to:
http://<phoneIPAddress>/servlet?p=accoun
t-basic&q=load&acc=0
Specify a period of delay time for auto
answer.
Configure auto answer tone.
Navigate to: