Instruction manual

Chapter 6. Troubleshooting
61200239L1-20 Express 3010/3110 User Manual 6-3
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 ter-
minal emulation package such as HyperTerminal to invoke the VT 100
menu system.
Ensure the following to verify the correct protocol is selected:
• PPP or V.120 generally for Internet applications
• V.120 or Multilink PPP for work-at-home
Auto-detect Switch/SPIDs Remains at Link
Down
The Link Down condition persisting for longer than five minutes indi-
cates a problem with the ISDN line provided from the telephone compa-
ny. The ISDN physical layer device has not been able to synchronize to
the network. Ensure that the RJ-45 to RJ-11 telephone cable is correctly in-
stalled between the Express and the ISDN wall jack and that the Express
is powered on. If the wall jack does not have ISDN installed on the two
middle pins (tip, ring), the Express will never synchronize to the tele-
phone switching equipment. Call the local telephone company and have
them check the ISDN line for correct operation.
Express Not Detected
If the Express Configuration program cannot detect the Express, veri-
fy the following:
1. The Express is powered on.
2. No other applications are running that could be using the COM
port to which the Express is attached. A Windows application
does not have to be active to tie up a COM port. Be sure to check
the Windows 95/98 Taskbar for any suspended applications
(such as HyperTerminal) that may be using the COM port. If any
are minimized, these must be closed before starting the Express
Configuration program.
3. If you are operating at 230.4 kbps, Switch 1 to Off (up). Also, con-
firm that the computer has a 16650 UART.