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232 Chapter 37 Hardware procedures
241-7401-240 5.2S1
Installing a control processor
Install a control processor in the appropriate slot in a Passport switch as part
of adding, replacing or upgrading a CP.
Prerequisites
• In general control processors must have matching PECs in order to act as
spares for one another.
• Ensure that the appropriate level of software is installed on the switch for
the replacement CP. For example, if you are installing a CP-with-BITS,
you will require a minimum software release of PCR4.2; if you will use
the external timing functionality you will require a minimum software
release of PCR5.1.
• CPs are installed in particular slots:
Slot 0 in a 3-slot Passport switch.
Slots 0 and 4 of a 5-slot Passport switch.
Slots 0 and 15 of a 16-slot Passport switch.
In a rack mounted 3-slot or 5-slot Passport switch, slot 0 is the bottom
slot. In any vertical mount Passport switch, slot 0 is the left-most slot.
Procedure steps
1 Unlock the latches on the CP. See the figure “Locking and unlocking
processor card latches” (page 239).
2 Carefully insert the processor card into the appropriate slot.
3 Pull open the top and bottom latches of the processor card and slide the
card into the slot until the locking latches begin to close.
CAUTION
Risk of service loss by signal noise
Inserting or removing a processor card from a Passport
shelf can cause noise on the backplane that causes loss
of service. Therefore, minimize the time you take to
insert or remove a processor card. Do not let a processor
card sit in the shelf with a partial connection to the
backplane.