Nortel Passport 15000, Установка и обслуживание оборудования, Страница: 751 / 874

Chapter 17 Hardware procedures 751
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade 5.2S2
4 Unplug the cable connectors on the faceplate of the FP. While unplugging,
pull straight away from the faceplate connector. Different types of
connectors have various disengaging mechanisms, as follows.
a. For standard coax or BNC cables, twist the connector until the pin
disengages the groove and pull.
b. For 8w8 mini-coax D-sub connectors, unfasten the captive screws
and pull.
c. For any other type of D-sub connector, unfasten the captive screws
and pull.
d. For FPs with Ethernet RJ-45 connectors, fully press down the tab on
the connector and pull. (The VSP3 card has Ethernet LC
connectors.)
e. For SC, LC, or MT-RJ fiber cable connectors, fully pinch the tab on
the connector against its side and pull straight out. Cover the ferrule
with an appropriate dust cap.
5 Allow the cables to hang aside temporarily.
6 When the FP is being replaced due to a failure and the FP has SFP
modules, record the PEC of each module relative to its position on the
faceplate so that you can plug it into the same socket (port) on the
CAUTION
Risk of equipment damage
To prevent equipment damage, disconnect the cables
attached to the ports of an FP before you disconnect the
control cable that connects the FP to a termination panel.
CAUTION
Risk of damage to the fiber transceivers on the FPs
When engaging or disengaging a fiber optical cable
connector to the connector on the FP faceplate (the
transceiver), you can damage the nose shield on the
connector or the optic transceiver by improper coupling.
This especially applies to MT-RJ connectors.
Before pulling the cable connector away from the
transceiver, you must ensure that the tab (latch) on the
cable connector is fully pinched against its side.