Ls/Gs Trunk Card; Brief Description; 125 9-L; Facilities - Mitel SX-200 Practices

9
' LS/GS TRUNK CARD
Brief Description
9.1- The Loop Start/Ground Start Trunk Card, part number 9109-01 I -XXX, mounts in
any digital bay and interfaces six trunk circuits to the system. The card is 158 mm
high x 388 mm long (6.2 in. x 14.5 in.). Figure 9-l illustrates the card .and the LS/GS
jumper.
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Facilities
9.2
Facilities provided by the LS/GS Trunk Card include:
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Loop Start or Ground Start selectable by jumper
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M and MM signaling leads available
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Trunk activity indicated by LED (one per trunk)
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Transient suppression on Tip, Ring, and signaling leads
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Alarm LED.
Electnkai Description
9.3 The Loop Start/Ground Start Trunk Card mounts in any digital bay and interfaces six
trunk circuits to the system. Each trunk circuit is programmed as loop start or ground
start by a jumper clip prior to installation.
Each trunk has Tip and Ring leads and M and MM leads for additional signaling, if
required. All leads are protected by varistors against transients between line and
ground. There are also varistors between Tip and Ring and between M and MM. Each
lead is in series with an inductor near the edge connector to reduce electromagnetic
interference (EMI).
Each trunk has an LED on the front faceplate of the card that lights to indicate the circuit
is busy. An LED at the bottom of the faceplate lights to indicate a failure on the card.
Operation - loop Start
9.4 To place an outgoing call, the trunk card places a termination across tip and ring. The
CO detects the current flow and responds with dial tone. Now the user may begin to
dial.
910949&125--NA Issue1
Revision
0
125 9-l