Nortel Networks 1000 - Manual (Page 437)

Technical summary 437
Table 174
Digital line card-power required
Voltage Current (max.)
±5.0 V dc 150 mA
+15.0 V dc 1.6 Amp
–15.0 V dc 1.3 Amp
The NT8D02 Digital Line Card provides +15 V dc over each loop at a
maximum current of 80 mA. It requires +15 V, -15 V, and +5 V from the
backplane. One NT8D06 Peripheral Equipment Power Supply ac or
NT6D40 Peripheral Equipment Power Supply dc can supply power to a
maximum of 16 digital line cards.
Table 175
NT8D02 Digital Line Card - power requirements
Voltage Current (max.)
±5.0 V dc 150 mA
+15.0 V dc 1.6 Amp
–15.0 V dc 1.3 Amp
Foreign and surge voltage protections
In-circuit protection against power line crosses or lightning is not provided
on the NT8D02 Digital Line card. The NT8D02 Digital Line card does,
however, have protection against accidental shorts to –52 V dc analog
lines.
When the card is used to service off-premise telephones, primary and
secondary Main Distribution Frame (MDF) protection must be installed.
Off-premise telephones served by cable pairs routed through the central
office, or crossing a public right-of-way, can be subject to a requirement for
on-card protection, and MDF protectors may not be acceptable. Check
local regulations before providing such service.
In-circuit protection against power line crosses or lightning is not provided
on the Digital line card.
In-circuit protection against power line crosses or lightning is not provided
on the digital line card. The digital line card does, however, have
protection against accidental shorts to –52 V dc analog lines.
When the card is used to service off-premise telephones, primary and
secondary Main Distribution Frame (MDF) protection must be installed.
Details on installing protection devices are given in
“Environmental
specifications” (page 317) .
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311 02.06 Standard
27 August 2008
Copyright © 2003-2008 Nortel Networks
.