Yealink SIP-T21 E2 Administrator's Guide

Configuring Advanced Features
615
LED Status
Description
number.
Off
The monitored user does not exist.
Line Key/Expansion Module Key LED (configured as a BLF key or a BLF List key and BLF LED
Mode is set to 1)
LED Status
Description
Fast-flashing red (200ms)
The monitored user receives an incoming call.
Solid red
The monitored user is dialing.
The monitored user is talking.
The monitored user’s conversation is placed on hold (This
LED status requires server support).
Slow-flashing red (1s)
The call is parked against the monitored user’s phone
number.
Off
The monitored user is idle.
The monitored user does not exist.
Line Key/Expansion Module Key LED (configured as a BLF key or a BLF List key and BLF LED
Mode is set to 2)
LED Status
Description
Fast-flashing red (200ms)
The monitored user receives an incoming call.
Solid red
The monitored user is dialing.
The monitored user is talking.
The monitored user’s conversation is placed on hold (This
LED status requires server support).
Slow-flashing red (1s)
The call is parked against the monitored user’s phone
number.
Off
The monitored user is idle.
The monitored user does not exist.
Line Key/Expansion Module Key LED (configured as a BLF key or a BLF List key and BLF LED
Mode is set to 3)
LED Status
Description
Fast-flashing green
(200ms)
The monitored user receives an incoming call.
Solid red
The monitored user is dialing.
The monitored user is talking.
The monitored user’s conversation is placed on hold (This
LED status requires server support).
Slow-flashing red (1s)
The call is parked against the monitored user’s phone
number.

Yealink SIP-T21 E2 Specifications

General

Brand	Yealink
Model	SIP-T21 E2
Category	IP Phone
Language	English