2.4 Telephony features

The UC/PBX platform supports various telephony functions which are often referred to as PBX features.

Shared line (BLF)

Busy Lamp Field (BLF) feature allows users to monitor several other extensions. Sometimes, the term "Direct Station Selection” is used for the same functionality. State of the monitored extensions is usually indicated by a series of LED lights with buttons.

1. Idle state – LED is green
2. Error state – LED is orange
3. Ringing state – LED is red (blinking)
4. Busy or Connected state – LED is red

BLF pickup

Pick up a call from an observed user
A user can pick up a call ringing at an extension observed through BLF.

Pickup up a call from a parking

Direct pickup

A user can pick up a call by dialing a special prefix * and then the number e.g. *101

The number can be assigned to a user, call group or parking.

Blind call transfer

An unannounced transfer is a when an active call is sent to another party without notifying the desired party/extension of the impending call. It is simply transferred to their line by way of a "transfer" key on the operator's phone or by keying in a string of digits which achieves the same function. Other terms commonly used for an unannounced transfer include "unsupervised" and "blind".

Attended call transfer

The attended transfer is when a transferor puts on hold transferee and dials the target number. When the target answers the transferor has a choice either to complete the transfer or to cancel it.