PBX Integration Board User's Guide

Dialogic

PBX Integration Board User’s Guide

A supervised transfer can be implemented without a Dialogic

PBX Integration

Board (e.g., using hook flash), but the availability and ease of implementation can

be inconsistent. Choosing to use a Dialogic

PBX Integration Board and the

appropriate dial string can enable you to initiate a transfer the same way for all

supported switches. Also, by choosing to incorporate call progress analysis, you

can be positioned to offer consistent, high-performance call transfer features in

applications. For example, if during the transfer the application detects a busy

signal, the call is automatically sent to a mailbox.

In a supervised transfer, an incoming call answered by a channel on a Dialogic

PBX Integration Board will only be transferred after the PBX Integration Board

establishes a connection with another station (the call is not released to the PBX).

If the extension is busy or does not answer, the PBX Integration Board reconnects

to the original call.

2.2. Blind Call Transfer

A blind transfer is initiated the same way as a supervised transfer. However, after

dialing the destination number, the extension performing the transfer hangs up

and does not wait to determine the outcome of the call. The call is released to the

PBX. Blind transfers are used in voice mail applications. A blind call transfer can

be likened to the following manual operations:

1. Answer a call.

2. Put the call on hold.

3. Press the transfer key.

4. Dial the destination number.

5. Hang up.

The call is immediately sent to the new extension. It is up to the PBX to

determine what to do if the transferred call is not answered (because of busy or no

answer). Usually, if a transferred call is not answered it is routed back to the

voice mail system, and eventually to the operator (or an automated attendant).

A benefit offered by blind transfer is that the immediate release to the PBX frees

the voice processing resources to handle new calls rather than being used to

perform call progress. A potential drawback can occur when phone traffic is