AT&T Synapse Installation Manual page 164

Symptom
I cannot make or receive
phone calls and the
T1 Gateway RAI/LOF/LOS
LED is flashing RED.
I cannot make or receive
phone calls and the
T1 Gateway AIS LED is
flashing BLUE.
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.
Troubleshooting
Synapse Installation Guide
Probable Cause
The Flashing Red alarm
indicates Loss of Signal
There is loss of valid signal
from the service provider.
The Blue Alarm is an Alarm
Indication Signal.
The T1 circuit is operating
correctly, but the service
provider is not sending
proper data.
The system is in Local
Network or Loopback test
mode.
The T1 Gateway is not
synchronized with the
Synapse system.
Corrective Action
1. Verify that your T1 cable is connected to the equipment.
2. Check the T1 Settings to confirm that the configuration
parameters (Signaling type, Build out) correspond to the
service provider's.
3. If the problem remains, contact your T1 service provider.
Contact your T1 service provider.

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 to the WebUI as administrator, click T1
a.
Settings, then T1 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.
163
T1 Gateway Indicators
to stop the test.