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