Modem Unit; Link Module Unit - Vodavi STARPLUS Triad XTS Installation Manual

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Chapter 3 - System Installation
Installing the PMU
1. Unpack the PMU from its antistatic conductive bag.
2. Locate the CN8 and CN9 connectors on the MPB. Locate the CN1 and CN9 connectors on
the PMU.
3. Position the PMU so that CN1 and CN2 align withCN8 and CN9 respectively on the MPB.
Push the PMU onto the respective connectors and make sure it seats properly.

Modem Unit

The Modem Unit (MODU) provides an asynchronous modem for access to the system
database and fault reporting features from a remote site. The module is optionally installed
on the MPB and incorporates a 19,200 bps modem. The modem may be connected to a
pre-selected CO Line through the system switching matrix.
Installing the MODU
1. Unpack the MODU from its antistatic conductive bag.
2. Locate the CN1 and CN2 connectors on the MPB. Locate the CN1 and CN2 connectors on
the MODU.
3. Position the MODU so that CN2 and CN1 align with CN1 and CN2 respectively on the
MPB. Push the MODU onto the respective connectors and make sure it seats properly.

Link Module Unit

The Link Module Unit (LMU) provides a link between the Cabinets of the KSU. LMU1 must be
installed to connect Cabinet 0 to Cabinet 1. LMU2 is used to connect Cabinets 1 and 2. Signals
are transmitted or received via linked cable. Set the clock source switch of LMU1 to the up
position for T1 clock source chain and to the down position for PRI/BRI clock source chain.
Figure 3-11: LMU1 Board Configuration
Main Processing Board Installation