ADTRAN 1200153L2 Auto-detect Switch/SPIDs Remains at Link Down, Express XR/XRT Not Detected

Chapter 5. Troubleshooting

The Status buffer can also be accessed using the key sequence Ctrl+V in the VT 100 menu system. Issue the AT command AT!V from a terminal emulation package such as HyperACCESS to invoke the VT100 menu system.

Auto-detect Switch/SPIDs Remains at Link Down

The Link Down condition persisting for longer than 15 minutes indicates a problem with the ISDN line provided from the telephone company. The ISDN physical layer device has not been able to synchronize to the network. Ensure the RJ-45 to RJ- 11 telephone cable is correctly installed between the Express XRT and the ISDN wall jack and that the Express XR/XRT is powered on. If the wall jack does not have ISDN installed on the two middle pins (tip, ring), the Express XR/XRT will never synchro- nize to the telephone switching equipment. Call the local telephone company and have them check the ISDN line for correct operation.

Express XR/XRT Not Detected

If the Express Configuration Wizard cannot detect the Express XR/XRT verify the following:

1.The Express XR/XRT is powered on.

2.No other Windows applications are running that could be using the COM port to which the Express XR/XRT is attached. A Windows application does not have to be active to tie up a COM port, be sure to check the Windows 95 Taskbar for any suspended applications (such as HyperTerminal and HyperACCESS) that may be using the COM port. If any are minimized, these must be closed before starting the Express Configuration Wizard.

3.If you are operating the Express XR/XRT at 230.4 kbps, ensure that switch 1 on the rear panel is off. This is required for operation at 230.4 kbps. Also, confirm that the computer has a 16650 UART.

61200.153L1-13 Express XR/XRT Quick Start Guide 49