If the DS1 Media Module connects to a line-side terminating device such as a PRI terminal adapter, complete the following steps.
Procedure
Verify that the switch DS1 and the line-side terminating device are administered using the same signaling mode, framing mode, and line coding.
Investigate the maintenance status of the line-side terminating device.
Refer to the Line-Side Terminating Device Operating Manual for information.
Contact the vendor of the line-side terminating device to diagnose the equipment.
Check the physical connection of the DS1 board to the terminating device, and check the premise distribution system or the intra-premise wiring for physical connection failures.
Replace the local DS1 Media Module and repeat the test.
