Nortel Networks Circuit Card 311 User Manual
Page 523
Technical summary
523
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
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 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.
Environmental specifications
Table 202 "Digital line card - environmental specifications" (page 524)
shows
the environmental specifications of the card.
Nortel Communication Server 1000
Circuit Card Reference
NN43001-311
01.04
Standard
Release 5.0
23 May 2008
Copyright © 2003-2008, Nortel Networks
.