Chapter 1, Safety, 1 general – Nortel Networks DCT1900 User Manual
Page 9: 1safety
Technical Product Manual - DCT1900
Safety and Regulatory Information, Safety
Safety-DCT1900/R8/mw
1-1
© 2000-2005
C
HAPTER
1
Safety
1.1
General
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Never install telephone wiring during a lightning storm.
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Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
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Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
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Note: Avoid touching or punching down the Base Station signal and power pairs as there is
-48Vdc present on these wires at all times.
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Use caution when installing or modifying telephone lines.
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Avoid using a telephone (other than a cordless type) during an electrical storm. Electric shock
from lightning may occur.
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Do not use the telephone to report a gas leak in the vicinity of the leak.
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Installation should conform to relevant national installation rules.
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The Modular Cabinet should be mounted in a restricted area.
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Do not mount the modular cabinet to a drywall using insertable plastic drywall plugs. These
will not safely support the cabinet. See Installation section for recommended mounting.
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Suitable for mounting on concrete or other non-combustible surface only. [This refers to the
floor covering/material beneath the cabinet(s)].
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Disconnect all power sources before servicing equipment.
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For the Modular Cabinet use Class II power sources (double insulated, conforms to UL1950,
Uout
≤
58 Vdc) only. The power source branch circuit over current protection must be rated
15A. The power source must be short circuit protected (15A maximum).
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A readily accessible disconnect device, that is suitably approved and rated, shall be
incorporated in the field wiring.
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Connect to a reliably grounded -48Vdc SELV source.
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Use minimum 14 AWG copper conductors.
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Service is to be performed by qualified personnel only.
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Torque power supply terminal block screws to 7 in. - lbs
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The safety status of the different interconnection points of the system are as follows:
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RS232A, RS232B ports: SELV circuits
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Power Failure and General Alarm contacts: SELV circuits
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Digital Trunk Unit (DTU) connections: TNV circuits
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Digital Link Unit (DLU) connections: TNV circuits
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Base Station connections: TNV circuits
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Sync ports Central Processing Unit (CPU): SELV circuits