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SCbus Interface Support

(Impact FX only)

Beginning with Feature Set 15A, Release 170, the software supports the Signal Computer System

Architecture (SCSA) protocol. SCSA is a standard that specifies the signal processing system for

PC-based voice and call processing, and telecom switching. An SCbus is a standard bus for

communications within an SCSA node. The SCbus features an architecture that includes a serial

message path for signalling and control and a 16-wire parallel Time Division Multiplexing (TDM) data

path.

An integral part of the feature is the SCbus interface board. This board connects Computer Telephony

Interface (CTI) applications that reside on one or more SCbus compatible circuit boards in the FXS's

computer portion (for example; network, voice, facsimile, speech recognition, video, and so forth) to

digital station or line ports installed in the FXS's telephony portion through the SCSA protocol.

The conversion of a CTI application from traditional analog ports to digital SCbus ports provides a more

effective and efficient operation.

The SCbus board translates the CTI application’s Application Programming Interface (API), which

requests and carries out basic services performed by the computer and telephony portions of the system,

to an API that the FXS system supports. Typical API requested services include call control services

such as these following items: receive ring events, off- and on-hook, hookflash, dial digits, and so forth.

The SCbus interface board mounts in any universal board slot in telephony portion on an Impact FXS

system and cable connects to the CTI application board that is plugged onto the passive backplane in the

computer portion of the FXS system. The internal cable connection between the SCbus board and the

CTI application board routes the voice-path signalling between the two locations. In addition to this

internal cable, the installation requires external cabling between the system's computer and telephony

portions. The particular external cabling required is dependent upon the CTI application being operated.

An SCbus installation includes the following items:

•

SCbus Interface Board (product code FXSCBUS)

•

SCbus Application Board or Boards (as needed)

•

SCbus Application Software Disk or Disks (as needed)

•

Enterprise ToolKit Software (product code ENTRP-SW, release 6A or later)

10 – SCbus Interface Support

(Impact FX only)

GCA40–219 Explaining The Software Release Features

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Comdial Impact FXS Bedienungsanleitung Seite 13