Additional Safety Information - Nortel BCM50 Installation And Maintenance Manual

40 International regulatory information
Warning: Risk of shock.
Ensure the BCM50 is unplugged from the power socket and that any telephone or
network cables are unplugged before opening the BCM50.
Read and follow installation instructions carefully
Warning: 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
BCM50 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.

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
• GASM8: The Nortel Networks GASM8 I/O ports are designated as OPX. This product does
provide Telecommunications Ringing Voltages and can be configured to provide Voltage
Message Waiting Indicator (VMWI). Installation of this device and all connections to this
device must be performed by Qualified Installation Personnel who are aware of the hazards
associated with telecommunications wiring and are aware of the local regulations for
treatment of telecommunications wiring for OPX deployment.
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)
Regulatory information