AT&T SB67030 System Administrator Manual page 102

AT&T SB67010 Gateway, SB67030 Deskset System Administrator's Guide
To resolve audio echo issues: (Continued)
3. Check the Loss numbers within the Line Calibration data box for each telephone line on each Gateway.
A Loss number above 10 indicates good audio performance.
4. If the loss number is below 10, the system will most often function normally, but there is an increased potential to
encounter audio performance issues like echo. If the Loss number is below 10 the following procedures can be used to
increase the loss value:
a. Unplug that telephone line at the Gateway.
b. After the line LED turns red, plug the line in again to recalibrate.
5. If the recalibration has no effect, a parallel device, such as a Fax Adapter, Alarm System, DSL modem, or DSL Splitter/Filter,
may be connected to the system.
Parallel external devices may effect line calibration. Temporarily disconnect these devices from the wall jacks that are for
the same telephone lines, as follows:
a. Unplug the non-system devices from the wall jacks that are for telephone lines plugged into the Gateways.
b. Unplug the telephone lines from the Gateway.
c. After the Gateway line LEDs turns red, plug the telephone lines into the Gateway again to recalibrate.
d. If there is a significant increase in the Loss number and improved audio performance on those lines after disconnecting
a parallel device, consult your telephone service provider to either investigate the problem or to install separate lines
for those parallel devices.
Common Troubleshooting Procedures 102