Yealink SIP-T3 Specifications download pdf (Page 154)

Administrator’s Guide for SIP-T2xP IP Phones

138

Busy Lamp Field

Busy Lamp Field (BLF) is used to monitor a specific user for status changes on IP phones.

For example, you can configure a BLF key on a supervisor’s phone to monitor the

phone user status (busy or idle). When the monitored user makes a call, a busy indicator

on the supervisor’s phone shows that the user’s phone is in use.

When the monitored user is idle, the supervisor presses the BLF key to dial out the phone

number. When the monitored user receives an incoming call, the supervisor presses the

BLF key to pick up the call directly. When the monitored user is on a call, the supervisor

presses the BLF key to interrupt and set up a conference call.

Visual Alert and Audio Alert for BLF Pickup

Visual and audio alert for BLF pickup allow the supervisor’s phone to play an alert tone

and display a visual prompt (e.g., “6001<-6002”, 6001 is the monitored extension which

receives an incoming call from 6002) when the monitored user receives an incoming

call. In addition to the BLF key, visual alert for BLF pickup feature enables the supervisor

to pick up the monitored user’s incoming call by pressing the Pickup soft key. The

directed call pickup code must be configured in advance. For more information on

how to configure the directed call pickup code for the Pickup soft key, refer to Directed

Call Pickup on page 103.

Note

LED Off in Idle

LED off in idle defines two flashing methods for the BLF key LED. The BLF key LED flashes

as below:

Line key LED (configured as BLF key when LED Off in Idle is disabled)

LED Status

Description

Solid green

The monitored user is idle.

Fast flashing green

The monitored user receives an incoming call.

Slow flashing green

(500ms)

The monitored user is busy.

Slow flashing green (1s)

The call is parked against the monitored user’s phone

number.

Off

The monitored user does not exist.

Memory key LED (configured as BLF key when LED Off in Idle is disabled)

Visual alert for BLF pickup is not applicable to the SIP-T20P IP phone.

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Yealink SIP-T3 Specifications Page 154