Peripheral Boards; Loop Start (Lcob) Trunk Board - STARPLUS Triad 1 Product Description Manual

Peripheral Boards

Peripheral Boards
These boards provide the interface from system PCM ports to stations or the switching
network. The peripheral cards may be placed in any universal card slot in either the Basic
Cabinet or Expansion Cabinet. These cards are described as follows:

Loop Start (LCOB) Trunk Board

The LCOB board provides the interface to eight CO, FX, or WATS trunks.
Each trunk circuit contains 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 circuit has an LED indicator that gives trunk status.
Each trunk circuit can be disabled as well as the card.
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.
The CO lines are connected via a 50-pin male amphenol 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.
Chapter 11 - Triad 3 System Configuration
11-9