Chapter 4: Troubleshooting
108
Express XL/XLT User Manual
61200.070L1-1
2.
Disconnect the Express XL/XLT. From a functioning voice phone, call the
local directory number(s) provided with your line. Calling a good ISDN
line with nothing connected usually results in a ring or fast busy tone. If
someone answers, or you get a not-in-service intercept, there is probably
something wrong with the translation of the line. The phone service pro-
vider should be able to help.
3.
If the Loop LED still remains off, then there is a physical problem with the
phone line (more than likely, a problem with the Layer 1 setup). The prob-
lem is in one or more of the places listed below:
•
The Express XL/XLT software setup
•
The Express XL/XLT hardware
•
The wiring on your premises
•
The telephone service provider’s wiring
•
The telephone service provider’s hardware
•
The telephone service provider’s software setup
To isolate the problem, perform the following procedure:
A. Ensure the line is plugged into the Express XL/XLT con-
nector marked
ISDN BRI U
on the back of the Express
XL/XLT.
B. Make sure the Express XL/XLT is configured for Dial
line service.
C. If possible, try another piece of functioning ISDN equip-
ment with a U-interface on the line.
D. Talk to your service provider and ensure you have an
ISDN Basic Rate U-Interface with 2B1Q line coding.
(Wrong options are an S or T interface or AMI line cod-
ing).
E. Ensure that your phone line is connected to the actual
telephone line (U-interface) provided by your telephone
company. Make sure your line is not connected through
another piece of equipment such as an NT1 in a wiring
closet.
F. Make sure nothing else is bridged across the line pair.
Содержание Express XL 1200070L1
Страница 14: ...List of Figures x Express XL XLT User Manual 61200 070L1 1...
Страница 16: ...List of Tables xii Express XL XLT User Manual 61200 070L1 1...
Страница 22: ...Quick Startup Guide 6 Express XL XLT User Manual 61200 070L1 1...
Страница 42: ...Chapter 2 Installation 26 Express XL XLT User Manual 61200 070L1 1...
Страница 122: ...Chapter 3 Terminal Menu Operation and Structure 106 Express XL XLT User Manual 61200 070L1 1...
Страница 130: ...Chapter 4 Troubleshooting 114 Express XL XLT User Manual 61200 070L1 1...
Страница 154: ...Appendix B Log Messages 138 Express XL XLT User Manual 61200 070L1 1...
Страница 158: ...Appendix C SNMP 142 Express XL XLT User Manual 61200 070L1 1...
Страница 164: ...Appendix E Terminal Mode Commands 148 Express XL XLT User Manual 61200 070L1 1...
Страница 174: ...Glossary 158 Express XL XLT User Manual 61200 070L1 1...
Страница 186: ...Index 170 Express XL XLT User Manual 61200 070L1 1...