Spectrum Peripheral Module - Nortel SL-100 Product Manual

124 Cabinet modular hardware
The SMA2 contains resources dedicated to subtending RDTs. These
resources act as logical entities known as Integrated Digital Terminals
(IDTs). One SMA2 supports up to eight IDTs, with each IDT being dedicated
to a corresponding RDT. Depending on traffic requirements, a number of
FCOT and RDT configurations are possible.
The SMA2 provides an ISDN interface through Enhanced D-channel Packet
Handler (EDCH) circuit cards. The EDCH cards and the DS-1 cards share
the same locations in the SMA2 module. For every DS-1 card that is
replaced with an EDCH card, the number of DS-1 ports is reduced by eight.
Extension shelf
The extension shelf provides space for additional DS-1 or EDCH cards. The
extension shelf comprises two half-width shelves with the left half being
dedicated to SMA2 0 and the right half being dedicated to SMA2 1. If the
extension shelf is populated with DS-1 cards, each side provides up to 24
additional DS-1 links for the SMA2 main shelves.
Both sides of the extension shelf requires two combination shelf power
supply and DS60 interface cards (two DS60 cards on each side). Each
DS60 card provides 14 DS60 links to one of the dual units on the SMA2
main shelf.
Modular Supervisory Panel
The Modular Supervisory Panel (MSP) distributes and controls power and
alarms in the cabinet. Interlocks for each LTC-I prevent power loss on the
duplicated units at the same time.
Cooling unit
The high-capacity cooling unit consists of four, high-speed DC-powered fan
blowers. Two of these four fans are operated with a separate power feed
for reliability.
Power requirement
The CMVI cabinet is powered by an external -48 V DC source provided
by either a CPDC or an MCAM unit. These cabinets are described in
"Maintenance and administration cabinet modules" (page

Spectrum Peripheral Module

The Spectrum Peripheral Module (SPM) delivers a high-speed Synchronous
Optical Network (SONET) interface to the Meridian SL-100 switch. Per
Trunk Signaling (PTS) and ISDN User Part (ISUP) signaling are used over
the SONET trunks to provide call processing capability. The SPM offers
1+1 redundant OC-3 trunking interface with integrated echo cancellation.
It is a fully integrated peripheral module that is operated, administered,
maintained and provisioned like other Meridian SL-100 peripheral modules.
Copyright © 2006, Nortel Networks
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Communication Server 2100
Meridian SL-100 Product Guide
555-4001-103 20.01 Standard
SE09 20 October 2006
127).
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