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3. PBX Integration Overview
The Dialogic
®
PBX Integration Board combines the voice and fax features
available in the 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 calls
• 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 Dialogic
®
PBX Integration Board uses a dual-processor architecture
comprising a DSP (Digital Signal Processor) and a general purpose
microprocessor to handle 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 Dialogic
®
PBX
Integration Board. This downloadable firmware gives the board its intelligence
and enables 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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