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3 Solving Problems
CommPlete Communications Server 13
Process. The LEDs can be used for low-level troubleshooting of the ISDN connection. Some of the most
common reasons for an ISDN connection failure are:
Problems involving HEART BEAT
• If the HEART BEAT LED is lit, it indicates the firmware has encountered an unrecoverable error. Verify
that the firmware has had time to load properly and that processes are successfully completed. Call
Tech Support if the problem persists.
Problems involving PHY LINK LINK
• The ISDN circuit is not connected to the PRI card. If the PHY LINK LED is Off it indicates the absence
of valid LEC circuit signaling. The ISDN circuit is not connected to the PRI card properly. Look for
missing or broken wiring from the LEC distribution facility, malfunctioning interconnect cabling
(broken wires, bad connectors, incorrect connector installation, etc.).
Recommended action: contact your LEC representative.
Problems involving RED ALARM LED
The PRI card is experiencing a high error rate or is not configured properly. If the RED ALARM LED is
lit, it indicates an improper receive signal or no receive signal. Check the configuration of the PRI card
with the PRISTATUS command at the controller. Contact your LEC representative or Multi-Tech's
Technical Support Department if you continue to experience this alarm.
Problems involving YELLOW ALARM LED
The device at the other end of the network is in red alarm. It may not be receiving the signal from the
PRI card. Contact your LEC representative.