Yealink SIP-T4X Administration Manual page 175

Administrator's Guide for SIP-T4X IP Phones
message. A GET request may contain variable named as "key" and variable value,
which are separated by "=". The valid URI format is:
http(s)://phone IP address/servlet?key=variable value.
The following table lists the pre-defined variable values.
Variable Value
OK
ENTER
SPEAKER
F_TRANSFER
VOLUME_UP
VOLUME_DOWN
MUTE
F_HOLD
X
CANCEL
0-9/*/POUND
L1-LX
F_CONFERENCE
F1-F4
MSG
HEADSET
RD
UP/DOWN/LEFT/RIGHT
Reboot
AutoP
DNDOn
DNDOff
number=xxx&outgoing_uri=y
OFFHOOK
ONHOOK
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Phone Action
Press the OK key.
Press the Enter soft key
Press the Speaker key.
Press the TRANSFER key (only for SIP-T46G) or the
Transfer soft key.
Increase the volume.
Decrease the volume.
Press the MUTE key.
Press the HOLD key (only for SIP-T46G) or the Hold
soft key.
Press the X key.
Return to a previous screen or cancel a call.
Send the DTMF digit (0-9, * or #).
Press the line key (for SIP-T46G, X=27, for
SIP-T42G/T41P , X=15).
Press the Conference soft key.
Press the soft key.
Press the MESSAGE key.
Press the HEADSET key.
Press the REDIAL key.
Press the Navigation keys.
Reboot the IP phone.
Let the IP phone perform auto provisioning.
Activate the DND mode.
Deactivate the DND mode.
Place a call to xxx from SIP URI y.
Pick up the handset.
Hang up the handset.