Mitel SUPERSET 420 User's Guide download pdf (Page 27)

3. PBX Integration Overview

The PBX integration board combines the voice and fax features available in the

Intel

Dialogic

D/4x product line with the ability to access enhanced PBX

features on several different PBXs. The voice features include:

• play and record voice messages

• dial and recognize DTMF digits

• detect and answer incoming call

• call progress analysis

• send and receive faxes

The PBX specific features include:

• retrieve Called/Calling number ID

• retrieve LCD/LED prompts and indicators

• read displays

• accessing PBX features using dial strings

• disconnect supervision

3.1. Voice Features Supported

The PBX integration board uses a dual-processor architecture comprising a DSP

(Digital Signal Processor) and a general purpose microprocessor to handle all

voice processing functions. This dual processor approach off loads many low-

level decision making tasks from the host computer.

When a PBX integration system is initialized, firmware is downloaded from the

host PC to the firmware RAM and DSP memory on the PBX integration board.

This downloadable firmware gives the board all of its intelligence and enables

easy feature enhancement and upgrades. Based on this, the PBX integration board

can perform the following operations on incoming calls:

• automatically control the volume of the incoming audio signal

• record and compress the incoming audio voice signal. Sampling rates and

coding methods are selectable on a channel by channel basis

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Mitel SUPERSET 420 User's Guide Page 27