Did Trunk Board (Didb) - STARPLUS Triad 1 Product Description Manual

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Chapter 11 - Triad 3 System Configuration

DID Trunk Board (DIDB)

The DIDB board provides the interface to eight loop Direct Inward Dialing (DID) trunks.
Each of the trunk circuits contain a hybrid, 2-wire interface circuit, and control circuitry.
The operation for Pulse Dialing or DTMF signaling can be done on a per circuit basis.
Each CO Line circuit has an LED indicator that gives trunk status.
A Normal/Service switch located toward the top of the card allows the card to be inserted
or removed from the system while under power.
Each trunk circuit can be disabled as well as the card.
The CO lines are connected via a 50-pin male champ (amphenol type) connector located
on the front edge of the card.
The card can accept a DTMF-B unit in a daughter board type arrangement.
The card ejector tabs are color coded white.
Figure 11-7: DIDB (Direct Inward Dialing Board)
Peripheral Boards