Ejector Levers - Cisco 7000 Series Hardware Installation And Maintenance Manual

Installing and Configuring Processor Modules

Ejector Levers

The function of the ejector levers is to align and seat the card connectors in the backplane. Failure
to use the ejector levers and insert the interface processor properly can disrupt the order in which the
pins make contact with the backplane. Follow the 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 SSP), or interface processor that is only partially connected to the backplane can
hang the bus. Detailed steps for correctly performing OIR are included in the following procedures
for installing and removing interface processors.
Following are detailed steps for removing and replacing interface processors and successfully
performing OIR. Figure 5-1 shows the functional details of the ejector levers, which you must use
properly when inserting or removing interface processors.
5-4 Cisco 7010 Hardware Installation and Maintenance
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.