TANDBERG 6000MXP user manual PRI Yellow Alarm, PRI Blue Alarm

TANDBERG 6000 MXP Profile

PRI Yellow Alarm

Yellow alarm or Remote Alarm Indicator (RAI) means that the system is receiving framing’ info, but in this framing info the other side tells the system that it is not reading the system s transmitted framing info. Typically, this may be a broken connector in the TX part of the system PRI cable. This could also indicate weak or noisy signal in the TX part of the system PRI cable.

PRI Blue Alarm

Blue alarm means that network on the far side of the CSU is unavailable.

Example:

The system– is– connected– via a CSU (i.e. a Channel Services Unit’) as follows: System– cableA CSU cableB Network

If a CSU loses framing/sync from the network (example: a bad cable B), it shall no longer send valid framing out on cable A towards the system. Instead it transmits "Blue Alarm". Seen from a system receiving blue alarm, this means that the network on the far side of the CSU is unavailable.

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