Fabric Card Transportation - Nortel Passport 15000 Hardware Description

Fabric card transportation

The method of transporting fabric cards differs between a Passport 15000 and
20000.
Each fabric of a Passport 15000 is shipped in its own transportation container.
The container and packaging protects the card from damage by minor impacts
and electromagnetic discharges (ESD).
Each fabric card of a Passport 20000 is strapped into a transportation position
against the rear of the shelf assembly. During transportation, the card
connectors are not engaged with the backplane. The outer card carrier
provides protection from ESD. After the NEBS 2000 frame or equivalent
mounting apparatus is anchored to the floor and the switch hardware is
fastened to that apparatus, removing the transportation strap allows the fabric
to be seated. Store the strap for re-use in case the shelf assembly is ever moved
from its position. See the figure "Transportation strap of a Passport 20000
fabric" (page 98).
The transportation strap for a fabric (part number P0936800) is not supposed
to be mounted on an in-service system because having to remove it to replace
a fabric will delay removal of the fabric. Replacing a fabric is a time-sensitive
task.
Put the strap aside for re-use whenever the shelf assembly is to be moved with
a fabric in the transportation position. Always keep a hand on the fabric to
ensure it stays against the shelf assembly.
Note: When the shelf assembly is shipped in its own container as part of
a shelf-based package (for example, NTQH03), the fabric is also shipped
in its own container. This makes the shelf assembly weigh less for
handling during installation into the mounting apparatus.
Each Passport 20000 in the upper position of a NEBS 2000 frame is shipped
with temporary protective tape covering the air vent of the fabric cage. If the
tape is not removed before initially powering up the node, the accumulated
heat that is trapped against the fabrics can exceed each fabric's temperature
threshold. When the threshold is exceeded, the fabric drops its traffic until the
temperature goes below the threshold. Built-in hysteresis prevents the fabric
from toggling between on and off at the temperature threshold. A shelf
Passport 15000, 20000 Hardware Description
Chapter 3 Shelf assembly 97
5.2S2