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Please specify your question about 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 *