Cisco CX-TRIP2 Installation And Configuration Manual page 14

Installation Prerequisites
The function of the ejector levers (see Figure 10) is to align and seat the card connectors in the
backplane. Failure to use the ejectors and insert the interface processor properly can disrupt the order
in which the pins make contact with the backplane. Follow the TRIP installation and removal
instructions carefully, and review the following examples of incorrect insertion practices and results:
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It is also important to use the ejector levers when removing an interface processor to ensure that the
board connector pins disconnect from the backplane in the logical sequence expected by the system.
Any RP, SP, or interface processor that is only partially connected to the backplane can hang the bus.
Detailed steps for correctly performing OIR are included with the following procedures for
installing and removing a TRIP.
14 Token Ring Interface Processor (TRIP) Installation and Configuration
Using the handle to force the interface processor all the way into the slot can pop the ejectors out
of their springs. If you then try to use the ejectors to seat the interface processor, the first layer of
pins (which are already mated to the backplane) can disconnect and then remate with the
backplane, which the system interprets as a board failure.
Using the handle to force or slam the interface processor all the way into the slot can also damage
the pins on the board connectors if they are not aligned properly with the backplane.
When using the handle (rather than the ejectors) to seat the interface processor in the backplane,
you may need to pull the interface processor back out and push it in again to align it properly.
Even if the connector pins are not damaged, the pins mating with and disconnecting from the
backplane will cause the system to interpret a board failure. Using the ejectors ensures that the
board connector mates with the backplane in one continuous movement.
Using the handle to insert or remove an interface processor, or failing to push the ejectors to the
full 90-degree position, can leave some (not all) of the connector pins mated to the backplane, a
state which will hang the system. Using the ejectors and making sure that they are pushed fully
into position ensures that all three layers of pins are mated with (or free from) the backplane.