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Joined: Sep 2005
Posts: 206
Member
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OP
Member
Joined: Sep 2005
Posts: 206 |
I have a 228. I get Blue alarms periodically.
"Blue Alarm
A blue alarm signal is an unframed all ones signal. It is transmitted by a remote device (usually a CSU) and when received,
indicates a transmission failure upstream of that device toward the local end. The AIS alarm signal is also
known as the “keep alive†signal. In that sense, it prevents the T1 (or ISDN PRI) circuit repeaters from malfunctioning
when transmit from the remote end is lost."
I don't really understand this. Is that saying that the CSU is having problems transmitting to the CO and that it sees this and is sending all 1's to the T1 card in the IDS so that the connection between the IDS and the Adtran stays up?
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