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