Nortel 15000 Hardware Description page 20

Introducing Multiservice Switch 15000 and Multiservice Switch 20000 hardware
one frame. The front view of a Multiservice Switch 20000 is very similar to a
Multiservice Switch 15000. The rear of the Multiservice Switch 20000 is
configured in the same manner, but has a different look.
Although a Multiservice Switch 20000 shares much of the Multiservice
Switch 15000 hardware, the shelf assembly of the Multiservice Switch 20000
has been re-designed with a scalable backplane, ship-in-place hardware, and
different plug-ins. Because of the physical improvements that the shelf
assembly provides, a Multiservice Switch 15000 cannot be upgraded to a
Multiservice Switch 20000 by changing plug-in cards or modules. Processor
cards from a Multiservice Switch 15000 or Multiservice Switch 20000 can be
shared, but the Multiservice Switch 20000 is a unique shelf with its own
software identity.
The plug-in modules and fabric cards at the rear of a Multiservice
Switch 20000 are redesigned for improved capacity, performance, or usability.
The modules include:
• the breaker interface modules (BIMs) with 25 A breakers
• the power interface modules (PIMs) with on/off LEDs
• a DS1 or a balanced E1 alarm/BITS module with an add-on balun cable
assembly to make the E1 unbalanced
• the MAC address module
• two fabric cards each with 70 Gbit/s usable shelf capacity (actual capacity
is 112.6 Gbit/s each)
The backplane of the shelf assembly is designed to accommodate fabric
cards of different capacities and is scalable to 160 Gbit/s. The initial 112 Gbit/
s fabric cards continue to load-balance and load-share with 70 Gbit/s of shelf
(user) capacity so that either fabric card can take over the load of its mate and
FP traffic is maintained.
A Multiservice Switch 20000 supports the same function processors (FPs)
that are supported by a Multiservice Switch 15000, and supports these control
processors (CPs), each with a building integrated timing supply (BITS)
interface:
• NTHW06 for a DS1 CP3
• NTHW08 for an E1 CP3
A Multiservice Switch 20000 can re-deploy FPs that were previously loaded
with Product Carrier Release (PCR) software 2.3 or later, and re-deploy CP3s
with PCR 3.1 or later software provided the cards are migrated to the current
PCR.
Copyright © 2005, Nortel Networks
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Nortel Networks Multiservice Switch 15000/20000
Hardware Description
NN10600-120 sPCR6.1S1 Standard
sPCR6.1 February 2005
Nortel Networks Confidential