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Chapter 5. Troubleshooting
48 Express XR/XRT Quick Start Guide 61200.153L1-13
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 Dial-Up Connection Problems.
Auto-Detect can be used under the Wizard button in the AD-
TRAN Express Configuration software (or by using the Auto-
Detect SPIDs/Switch option in the Configuration screen of the
VT 100 menus) to automatically detect the SPIDs and the Switch
Type.
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 work-at-home
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.