Nortel R2MFC Installation And Configuration Manual page 42

42 Chapter 4 Installing the R2MFC MBM
Warning: Only allow qualified persons to service the BCM 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.
Warning: 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, high-leakage currents available on metal system surfaces can occur.
System shutdown: You must disconnect the R2MFC 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 an R2MFC MBM.
Danger: Electrical shock hazards
Electrical shock hazards from the telecommunications network and AC mains are possible
with this equipment. To minimize risk to service personnel and users, the BCM system
must be connected to an outlet with a third-wire ground. In addition, all unused slots must
have blank faceplates installed. The covers on all units must be in place at the completion
of any servicing.
Figure 15 on page 43
R2MFC MBMs.
NN40010-300
provides an overview of the process for connecting trunk wiring to the BCM