Installation guide

Troubleshooting 165
Synapse Installation Guide
PSTN Gateway Setup
I cannot make or receive
phone calls and the
T1 Gateway SYN/ACT LED is
OFF and RAI/LOF/LOS LED is
RED.
The T1 Gateway is not
synchronized with the T1
service.
 Check the correct T1 cable is used and that it is properly
connected to the T1 Gateway.
Symptom Probable Cause Corrective Action PSTN Gateway Setup
On a PSTN Gateway, Line-
Status LEDs do not flash red
when the telephone line
cords are plugged into the
Gateway after power is
switched on.
Line calibration allows the
PSTN Gateway to adjust its
performance depending on
the phone lines’
characteristics. The Gateway
may not have performed
calibration.
 Make sure an Ethernet cable is plugged into the port
marked LAN.
 Unplug the PSTN telephone line and wait two full seconds
for the Gateway line LED to turn red before plugging it
back in.
On a PSTN Gateway, Bypass
jack does not work during
power failure.
The PSTN line is not in the
correct jack.
 Make sure there is a PSTN line plugged into Line 4.
 Make sure an analog phone is plugged into the Bypass
jack (using a modular line cord).
Symptom Probable Cause Corrective Action T1 Gateway Indicators