Yealink SIP-T54S Administrator's Manual page 918

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
codec as your voice and is audible to conversation partners.
SIP INFO
DTMF digits are transmitted by the SIP INFO messages when the voice stream is established
after a successful SIP 200 OK-ACK message sequence. The SIP INFO message is sent along the
signaling path of the call. The SIP INFO message can transmit DTMF digits in three ways: DTMF,
DTMF-Relay and Telephone-Event.
Procedure
Configuration changes can be performed using the following methods.
Central Provisioning
(Configuration File)
Web User Interface
892
Configure the method of transmitting DTMF
digit and the payload type.
Parameters:
<MAC>.cfg
account.X.dtmf.type
account.X.dtmf.dtmf_payload
account.X.dtmf.info_type
Configure the number of times for the IP
phone to send the end RTP Event packet.
Parameter:
features.dtmf.repetition
Specify how long the phone should play
each DTMF tone for.
Parameter:
features.dtmf.duration
<y0000000000xx>.c
fg
Configure the frequency level of DTMF
digits.
Parameter:
features.dtmf.volume
Specify how long the phone should wait
between DTMF digits.
Parameter:
features.dtmf.min_interval
Configure the method of transmitting DTMF
digits and the payload type.
Navigate to:
http://<phoneIPAddress>/servlet?p=accou
nt-adv&q=load&acc=0