ADTRAN Express 3100, User Manual

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Chapter 8. Troubleshooting
8-4 Express 3100 User Manual 61200240L2-20
Dial-up connection problems.
A variety of causes may result in dial-up connection problems.
1. Status Buffer messages returned from the ISDN network and the
Express 3100 can help diagnose many dial-up connection prob-
lems.
a. Access these messages by clicking Status Buffer (Local or
Remote) on the diagnostics option on the ADTRAN
Express Configuration window.
b. Alternatively, you can access the Status Buffer by using the
key sequence Ctrl+V in the VT-100 menu system. (To invoke
the VT-100 menu system, issue the AT command
AT!V
from
a terminal emulation package such as HyperTerminal.)
2. 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