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P0993133 03
Safety
Additional Safety Information
The following interfaces are classified as Telecommunication Network Voltage (TNV) circuits, and may be
connected to exposed plant:
• DTM interface
• WAN interface
• TCM Isolator
The following interfaces are classified as Safety Extra Low Voltage (SELV) circuits, and shall not be
connected to exposed plant:
• BRIM Interface
• TCM extensions
• external music sources (MSCX)
• auxiliary ringer (AUX)
• paging system relay (PAGE)
WARNING!
Only qualified service personnel may install this equipment. The instructions in this
manual are intended for use by qualified service personnel only.
Risk of shock.
Ensure the Business Communications Manager is unplugged from the power socket
and that any telephone or network cables are unplugged before opening the
Business Communications Manager.
Read and follow installation instructions carefully
Only qualified persons should service the system.
The installation and service of this hardware is to be performed only by service
personnel having appropriate training and experience necessary to be aware of
hazards to which they are exposed in performing a task and of measures to minimize
the danger to themselves or other persons.
Electrical shock hazards from the telecommunication network and AC mains are
possible with this equipment. To minimize risk to service personnel and users, the
Business Communications Manager system must be connected to an outlet with a
third-wire Earth.
Service personnel must be alert to the possibility of high leakage currents becoming
available on metal system surfaces during power line fault events near network lines.
These leakage currents normally safely flow to Protective Earth via the power cord.
Therefore, it is mandatory that connection to an earthed outlet is performed first and
removed last when cabling to the unit. Specifically, operations requiring the unit to be
powered down must have the network connections (exchange lines) removed first.