Technicalsummary 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 mustbe 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 323).
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 mustbe 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
Table202 "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
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