Shelf Assembly - Nortel Passport 15000 Hardware Description

Chapter 3

Shelf assembly

A NEBS 2000 frame supports two shelf nodes, an upper and a lower. Each
shelf node is a separate Passport 15000 or 20000. A shelf node is mostly
comprised of the power distribution unit, the cooling unit, and a shelf
assembly. A shelf assembly accommodates:
• plug-in processor cards or filler cards in two rows (cages) across the front
• a cable management channel across the front
• the identification logo of the Passport model on the cover of the upper
cable management channel since the front of a Passport 20000 appears to
be the same as a Passport 15000; (on some earlier models of
Passport 15000, the cable cover is blank)
• two plug-in fabrics across its rear
• plug-in modules at the rear for power input, hardware alarms, external
timing interfaces, and the MAC address
• the temperature sensors on an upper shelf for the upper cooling unit
• supporting the cooling fans which dissipate the heat generated by the
Passport 15000 or 20000
• an ESD jack to plug a wrist strap into
The card slot numbers are sequential through both cages. The cages hold the
processor cards which manage the node and provide physical interfaces for
connection to high-speed data networks. The parts which make up the shelf
assembly allow the processor cards to
• inter-communicate (across both card cages)
Passport 15000, 20000 Hardware Description
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