Specifications

Overview
5
Line key LED (configured as a BLF key or BLF List key)
LED Status
Description
Solid green
The monitored user is idle.
Fast flashing red (200ms)
The monitored user receives an incoming call.
Solid red
The monitored user is busy.
Slow flashing red (1s)
The call is parked against the monitored user’s
phone number.
The monitored user’s conversation is placed on
hold (This status requires server support).
Off
The monitored user does not exist.
Line key LED (used as a page switch key)
LED Status
Description
Solid red
There is a parked call on the line key of the
non-current page.
Solid green
There is a call on the line key of the non-current
page.
Fast flashing green
The line receives an incoming call on the
non-current page.
Fast flashing red
The monitored user receives an incoming call on
the non-current page.
Off
Line keys on every page are idle.
Note
Two ways to customize configurations of your SIP-T42G IP phone:
 The user interface on the IP phone.
 The user interface in a web browser on your PC.
The hardware components keypad and LCD screen constitute the phone user interface,
which allows the user to execute all call operation tasks and basic configuration
changes directly on the phone. In addition, you can use the web user interface to
access all configuration settings. In many cases, it is possible to use either the phone
user interface and/or the web user interface interchangeably. However, in some cases,
it is only possible to use one or the other interface to operate the phone and change
settings.
The above introduces the default LED status. The statuses of the power indicator LED and
BLF key are configurable via web user interface. For more information, refer to
Yealink_SIP-T4X_IP_Phones_Administrator_Guide .