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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 be experienced 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 flow safely to protective earth ground through the power cord.
However, if the ac power is unplugged prior to disconnecting the cables from the BCM50
units, this hazard can occur.
System shutdown: You must disconnect the telephony and data networking 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 telephony and data-networking cables.
To connect telephone lines to DTM, BRIM, or 4x16 MBMs
1
Obtain a telephone cable with a modular plug that matches the MBM to which you are
connecting:
•
RJ-48C—for DTM
•
RJ-45—for BRIM
•
RJ-11—for 4x16
2
Plug the modular cable into the jack in the front of the MBM.
3
Connect the other end of the cable to the telephone company demarcation blocks of the
building.
4
To connect telephone lines to another MBM, repeat steps 1 to 3 to for each additional line.
Warning: If the network ISDN is a U-loop, the BRIM must be connected only to an
NT1 provided by the service provider. The NT1 must provide a Telecommunication
Network Voltage (TNV) to Safety Extra Low Voltage (SELV) barrier.
Note: Do not attempt to plug digital equipment into the auxiliary (AUX) jacks on the
front of 4x16 MBM.
5
Select the appropriate option for your system:
•
If your system includes a 4x16 MBM, go to
page 32 for instruction about wiring the extensions for this MBM.
Chapter 3 Hardware installation
Connect extensions to the expansion unit
Installation Checklist and Quick Start Guide
31
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