Telos Zephyr Xstream User Manual page 298

Is the problem only with one BRI circuit? Does the problem move when you switch the line to
another ISDN unit?
If the problem remains with the line, then call your Telco. If you are supposed to be
using the Xstream's built‐in NT1 (i.e. the U interface) be sure to note if you have U
Sync (note the green LED near the U jack on the rear of the Xstream). If you have a
fast blinking U Sync light the problem is most likely your ISDN circuit. If the U Sync
LED is lit solidly, then suspect a line configuration ("provisioning" in Telco‐speak)
problem (also review the information in the previous questions).
Are you using the Xstream's internal NT1 ? (USA & Canada only)
The LED indicator of the status of the ISDN connection is on the rear panel near the
U jack. If the circuit is inactive, the LED will remain in the rapidly flashing state. This
state indicates a loss of the ISDN BRI circuit at the lowest (physical) level. Try
another line cord or try another line in to see if the same thing happens.
If the NT1 can contact the central office, the LED will blink slowly (about 1 Hz). If the
LED remains in this state there is an internal Xstream problem or you could be
connected to the wrong jack on the back (Users in USA & Canada should be using
the lower, RJ11 style, jack). The LED will come on solidly when all handshaking is
completed and the basic (low level) line connection is good.
If the LED stays on, with the ISDN disconnected, or does not come on at all, there is
a hardware problem. See above for more on this LED.
Condition: Line 1 will accept call however Line 2 will not
Have you entered Directory numbers in the MSN/DN1 &2 entries in the TEL menu?
These are required if you are using DMS‐Custom or Natl I‐1 for your ISDN type.
Condition: Can place calls, or receive calls, but not both
If your line is using National ISDN and your Telco is set to DMS Cust., or vice versa, you may see
this behavior. Try the other setting.
If your line is using National ISDN or DMS‐Custom, you must have your Directory Numbers
entered to receive calls.
Condition: System says Ready but attempted calls do not complete (goes back to
Ready or sits at Seize Pending)
Are your SPIDs and Telco setting correct?
We've included quite a few useful tips above on SPIDs and on how to guess your
ISDN protocol. If SPIDs are required and have been omitted a false "Ready" may be
displayed.
Can you dial from Line 1 to Line 2?
If you can successfully call from one line to the other, you know that your SPIDs and
ISDN protocol settings for that line are correct and that the ISDN circuit itself is ok.
Section 13: Deep Tech Information and Troubleshooting
USER'S MANUAL
286