CTRL CARD T1/E1 APS The T1/E1 APS Control Card in combination with the I/F CARD T1/E1 APS (90-6345-02) and T1/E1 APS SHELF (90-6344-01) provides N:1 Automatic Protection Switching support for T1/E1 CE Cards on the 7470. Each T1/E1 Card serving as a protec

CTRL CARD T1/E1 APS The T1/E1 APS Control Card in combination with the I/F CARD T1/E1 APS (90-6345-02) and T1/E1 APS SHELF (90-6344-01) provides N:1 Automatic Protection Switching support for T1/E1 CE Cards on the 7470. Each T1/E1 Card serving as a protection card on the 7470 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 T1/E1 APS Shelf.