Chapter 5. Troubleshooting
Power/Line LED, B1, and B2 LEDs Flash Green
This indicates a configuration problem. Verify the following information is correct:
•Switch Type
•Service Profile Identifiers (SPIDs)
•ISDN Phone Numbers
This information can be viewed by choosing the Status Register button under the Diagnostics tab of the ADTRAN Express Configuration Wizard window or the Configuration Screen in the VT 100 menu system. The Link Status should indicate Link Up if all configuration information is correct and the unit is properly connected. If the link status is good and calls still can not be placed, review the section for
Look for the following with the COM port setup:
•IRQ conflicts.
•Wrong DTE speed.
•Use Microsoft diagnostics (msd.exe) to verify the COM port has 16550 UART (for speeds of 115.2 kbps and below) or a 16650 UART (for speeds up to 230.4 kbps).
•Proper COM driver is installed (not provided) to support DTE speeds above 19.2 kbps.
Verify the correct protocol is selected:
•PPP or V.120 generally for Internet applications
•V.120 or Async BONDING for
Dial-Up Connection Problems
Many connection problems can be diagnosed by viewing the status buffer message returned from the ISDN network and the Express XR/XRT. These messages are accessed by choosing the Status Buffer button in the Diagnostics tab of the ADTRAN Express Configuration window.
48 | Express XR/XRT Quick Start Guide |