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Technical Description of TANDBERG Gateway with software version G2
D13192 Rev. 02 15
4.1.6 LEDs Description
The TANDBERG Gateway has 24 LEDs (Light Emitting Diodes) on the front panel. Each
giving various information, as shown below.
4.1.6.1 Description of PRI Alarms
A PRI cable consists of four wires (2 pairs of wires): One pair for Transmit (TX) and one pair
for Receive (RX) signals.
Red Alarm
Red alarm or Loss of signal (LOS) means that there is no signal and thus no framing info
received. (This has same effect as pulling out the PRI cable).
Yellow Alarm
Yellow alarm or Remote Alarm Indicator (RAI) means that the TANDBERG Gateway is
receiving framing info, but in this framing info the other side tells the TANDBERG Gateway
that it is not reading the TANDBERG Gateway’s transmitted framing info. Typically, this may
be a broken connector in the TX part of the TANDBERG Gateway PRI cable. This could also
indicate weak or noisy signal in the TX part of the TANDBERG Gateway PRI cable.
Blue Alarm
Blue alarm means that network on the far side of the CSU is unavailable.