AT&T SB67040 User Manual page 278

Symptom
I cannot make or receive
phone calls and the
T1 Gateway LOOPBK LED is
GREEN or flashing GREEN.
I cannot make or receive
phone calls and the
T1 Gateway LOOPBK LED is
RED.
I cannot make or receive
phone calls and the
T1 Gateway SYN/ACT LED is
OFF and RAI/LOF/LOS LED is
RED.
I cannot make or receive
phone calls but the T1
Gateway SYN/ACT LED is
Green.
Troubleshooting
Synapse User's Guide
Probable Cause
The system is in Local
Network or Loopback test
mode.
The T1 Gateway is not
synchronized.
The T1 service is not
synchronized.
There are no T1 channels
available to make the call.
Corrective Action
The LOOPBK LED should only be ON when you have
activated a Loopback test. If this test should not be
running, disable the Loopback Test in the Admin WebUI.
Log in as administrator, click T1 Settings, then T1
a.
Diagnostics.
b. Change the T1 in loopback test mode by selecting
from the Set Loopback Mode drop-down list.
Select none and then
c.
Check the Ethernet Connection to your Synapse T1
Gateway.
Check the correct T1 cable is used and that it is properly
connected to the T1 Gateway.
Check the Trunk Reservation Configuration to make
sure that there are still some T1 channels or PSTN lines
available. Make sure that Number of Voice Channels
and Lowest Voice Channel have been configured
correctly.
278
Gateway Troubleshooting
to stop the test.