SWITCH I/F CARD PMX clei This card is required in each 3600 Peripheral Shelf pair (1 or 2 depending on Peripheral redundancy). For upgrade of a 3600 to a 3600 Peripheral Shelf, each 3600 Expander card is replaced by a Switching Interface Card. This assemb

SWITCH I/F CARD PMX clei This card is required in each 3600 Peripheral Shelf pair (1 or 2 depending on Peripheral redundancy). For upgrade of a 3600 to a 3600 Peripheral Shelf, each 3600 Expander card is replaced by a Switching Interface Card. This assembly is similar to 90-0639-01 but allows for rear panel connectivity. This assembly contains a Telcordia CLEI (Common Language Equipment Identifier) label.