Appendix E. Troubleshooting
E-2 ATLAS 550 User Manual 61200305L1-1
Misconfiguration, improper cabling
• Verify that the T1 signal is being received. If not, check that the cabling
is correct.
• Verify that the T1 is being received without errors. If not, double-check
that framing and coding are set properly.
• Verify that desired dedicated map is active.
• Verify that bandwidth is mapped to the correct V.35 port.
• Verify that the V.35 port is set to the correct data rate (terminal inter-
face).
• Check T1 performance using the terminal interface; ifthere are excessive
errors, report fault to the Telco.
• Verify proper state of DTE signals via the terminal interface.
Misconfiguration
• Verify that the endpoint has proper call accept/reject criteria. For RBS
applications, check signaling bit status on the terminal interface for
proper operation.
• Verify that the endpoint is set up for correct signaling.
Misconfiguration, improper cabling
• Check cabling, verify that the Control/Chain In port rate matches that
of the attached terminal.
Cannot pass data from T1 interface to V.35 port
Switched calls are not working
Cannot communicate with ATLAS 550 using VT-100 connected to
the Control/Chain In Port
