Chapter 6 Troubleshooting; General; Ns Led On; Os Led On - Motorola DDS/MR64 Installation And Operation Manual

GENERAL

If the unit appears to malfunction, verify the following before further
troubleshooting:
• Telco and DTE connectors are correctly inserted and attached
• DDS/MDDS/MR64R64 is plugged into power socket and jack
• Power is available at the plug
• Timing is selected to DDS (and only DDS)

NS LED ON

The NS LED being on indicates a line disorder. Recheck for proper
Telco line connection

OS LED ON

If the OS LED is on, check the power and Telco line connections on the
remote unit.
If remote unit is set up properly, report the problem of "out-of-service"
code on the DDS circuit to the telephone company.

TM LED ON

If the TM LED is on perform the following steps:
• Ensure unit is in DATA mode and disable all DTE test functions
• Disconnect the DTE and Telco cables
• Toggle power on, off, on.
• If TM light remains on, refer to Chapter 9, Maintenance.

TM LED FLASHING

If TELCO INITIATED LOCAL LOOPBACK or TELCO INITIATED
REMOTE TERMINAL appears on the LCD, remove the Telco cable. If
the TM LED stops flashing, report to the telephone company that the
DDS circuit is in a test configuration. If the TM LED continues flashing,
refer to Chapter 9, Maintenance.
DDS/MR64
Chapter 6
Troubleshooting
6-1