User's Manual

24 Chapter 3 Physical installation
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To install MBMs
1 Ensure that the switches on the MBM are set correctly (see Table 6 and Table 7).
In the case of FEM MBMs, the switches activate the front ports. Ensure that the switches
accurately reflect the ports you require.
2 Select an open MBM bay.
3 With the face of the MBM facing toward you, insert the MBM into the open bay.
4 Push the MBM completely into the unit. You will hear a click when the MBM is firmly seated
in the bay.
5 Repeat steps 2 to 4 for each MBM you want to install.
Connecting the MBM wiring
Refer to the chapter “Installing a media bay module (MBM)” in the BCM200/400 4.0 Installation
and Maintenance Guide for more detailed information.
This section describes how to wire the cables that connect to the station and trunk MBMs.
• Station MBMs have one (ASM, DSM16, 4x16) or two (DSM32) 50-pin amphenol connectors
(25-pair cables).
• Trunk MBMs (CTM4, CTM8, 4x16, DTM, and BRI) connect to central office trunks using
RJ-type jacks. However, the GATM4 and GATM8 have a 50-pin amphenol connector (25-pair
cable).
Caution: Only install the MBMs when the system is powered down.
Warning: Use only qualified persons to service the system.
The installation and service of this unit must be performed by service personnel with the
appropriate training and experience. Service personnel must be aware of the hazards of
working with telephony equipment and wiring. They must have experience in techniques
that minimize any danger of shock or equipment damage.
Leakage currents: Service personnel must be alert to the possibility of high leakage
currents becoming available on metal system surfaces during power line fault events on
network lines. These leakage currents normally safely flow to Protective Earth ground
through the power cord. However, if the AC power is unplugged prior to disconnecting the
cables from the front of the base function tray, this hazard can occur.
System shutdown: You must disconnect the MBM cables from the system before
disconnecting the power cord from a grounded outlet.
System startup: You must reconnect the power cords to a grounded outlet before
reconnecting the cables to the MBMs.
4 minutes/MBM