numbers, reject incoming calls by pressing the
X key, answer incoming calls by lifting the
handset, pressing the Speakerphone key, the
HEADSET key or the OK key, place an active
call on hold by pressing the Hold soft key or
the HOLD key, resume the held call by
pressing the Resume soft key or the HOLD key,
and end the call by hanging up the handset,
pressing the Speakerphone key or pressing
the X key (pressing the X key to end the call is
not applicable to SIP-T22P/T21P/T20P). For
SIP-T22P/T21P, HOLD key does not exist; For
SIP-T20P, soft keys do not exist. For SIP-T19P,
HOLD and X keys do not exist.
If it is set to 0 (Disabled), IP phone lock feature
is disabled.
Configures a new unlock PIN. Once the IP
phone is locked, you can use the default
password “123” to unlock it.