Troubleshooting
CSX400 and CSX400-DC User’s Guide 213
Status 2 (STS 2) LED is RED WPIM-HDSL Installed in CSX400
WPIM-HDSL is configured for either Full T1 and the WPIM is not able to establish
synchronization on Loop 2 with the remote HDSL circuit.
•Verify using QuickSET of Local Management that one of the WPIM-HDSL is involved in the
connection is set to Master (Local) Timing and that the other one is set to Slave (Loop) Timing.
•Verify the use of proper cabling for the HDSL connections. Category 3 or Category 5
Unshielded Twisted Pair copper wiring is required. One pair (2 wires) for Fractional T1, two
pair (4 wires) for Full T1. The presence of bridged taps and multiple wire segments connected
together to form the loop may reduce the maximum distance usable between the Remote and
Local devices. Wire gauge has an impact on the distance which can be supported as well. The
maximum distance is 12,000 feet using 24 AWG wiring.
•Verify the gauge and condition of the wire. A trained line technician may be necessary to
determine this.
•Verify that the distance between the Remote and Local units is less than 12,000 Feet.
Status 2 (STS2) LED is AMBER
WPIM-T1, WPIM-E1, or WPIM-DI Installed in CSX400
The device is in Yellow alarm mode. A Yellow alarm indicates that the CSX400 is
receiving proper framing from the Telco, but the Telco is not receiving proper framing.
•Check for faulty or incorrect cabling between Telco and CSX400.
•Request that the Telco verify the configuration and operation of the circuit.
Status 2 (STS2) LED is GREEN
WPIM-SYNC Installed in CSX400
The Port is operating normally, Clear to Send (CTS) has been received by your WAN device.
•If it is not, check STS 1 to determine if the Port is Sending a Request to Send (RTS) to the CSU/
DSU it is connected to.
•Verify the cabling being used between the CSX400 and the CSU/DSU.
•Check the CSU/DSU for proper operation.