CTRL CARD PRI APS The PRI APS Control Card in combination with the I/F CARD PRI APS (90-6345-02) and E1/T1 PRI APS SHELF (90-6344-01) provides N:1 Automatic Protection Switching support for T1/E1 CE Cards on the 36170. Each T1/E1 Card serving as a protect

CTRL CARD PRI APS The PRI APS Control Card in combination with the I/F CARD PRI APS (90-6345-02) and E1/T1 PRI APS SHELF (90-6344-01) provides N:1 Automatic Protection Switching support for T1/E1 CE Cards on the 36170. Each T1/E1 Card serving as a protection card on the 36170 must be connected to an APS Control Card in the APS Shelf. The APS Control Card controls the relays on APS Interface Cards and allows multiple N:1 protection groups to be supported within the same PRI APS Shelf.