Yealink SIP-T48G Administrator's Manual page 731

Parameters
Note: It works only if the value of the parameter "phone_setting.phone_lock.enable"
is set to 1(Enabled).
Web User Interface:
Features->Phone Lock->Phone Lock Time Out (0~3600s)
Phone User Interface:
Menu->Settings->Advanced Settings (default password: admin) ->Phone
Lock->Lock Time Out
phone_setting.emergency.number
Description:
Configures emergency numbers.
Multiple emergency numbers are separated by commas.
For SIP-T46G/T42G/T41P/T40P/T29G/T27P/T23P/T23G/T21(P) E2/T19(P) E2/CP860:
If the value of the parameter "phone_setting.phone_lock.enable" is set to 1
(Enabled) and "phone_setting.phone_lock.lock_key_type" is set to 0 (All Keys), you
can only allow to dial emergency numbers configured by
"phone_setting.emergency.number".
For SIP-T48G:
If the value of the parameter "phone_setting.phone_lock.enable" is set to 1
(Enabled), you can only allow to dial emergency numbers configured by
"phone_setting.emergency.number".
Web User Interface:
Features->Phone Lock->Emergency
Phone User Interface:
None
Phone Lock Type
The following table lists the operation behavior when configuring the type of phone
lock:
Allow Behavior: You are allowed to
press the desired Line Key (key type is
Idle line) or the Speakerphone key to enter
screen the pre-dialing screen.
Keys not Locked: Line keys (key type is
line), digit keys, volume key,
String within 99 characters
All Keys
Configuring Security Features
Permitted Values
Function Keys Menu key
The Menu
key (key
The same as
type is
All Keys.
menu) is
locked.
Default
112,911,
110
711