Yealink SIP-T48G Administrator's Manual page 218

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
Procedure
Call hold can be configured using the configuration files or locally.
Configuration File
Local
204
<y0000000000xx>.cfg
<MAC>.cfg
Web User Interface
Configure the call hold tone and
call hold tone delay.
Parameters:
features.play_hold_tone.enable
features.play_hold_tone.delay
Specify whether RFC 2543
(c=0.0.0.0) outgoing hold
signaling is used.
Parameter:
sip.rfc2543_hold
Configure MoH on a per-line
basis.
Parameter:
account.X.music_server_uri
Configure the call hold tone and
call hold tone delay.
Specify whether RFC 2543
(c=0.0.0.0) outgoing hold
signaling is used.
Navigate to:
http://<phoneIPAddress>/servlet
?p=features-general&q=load
Configure MoH on a per-line
basis.
Navigate to:
http://<phoneIPAddress>/servlet
?p=account-adv&q=load&acc=
0