On Thursday, September 13, 2007 4:58 AM Richard van der Hoff said > Thanks for your help, but again I'd like to ask: what does a yellow > alarm actually mean? From the driver source code I can see it is set > when the FRS0 register has bit 4 set - but that doesn't help a lot... >
All of my experience has been with T1s, not E1s but I assume the alarms mean the same even though they are transmitted differently. Suppose that there are three pieces of equipment 'A', 'B', and 'C' and the signal from 'A' to 'B' has been interrupted (designated by the 'X' in the diagram) so that 'B' is not seeing an incoming signal. 'B' will be in red alarm, and 'B' will transmit back to 'A' a yellow alarm indicator. When 'A' see the yellow alarm indicator, 'A' will go into yellow alarm. Just to complete the picture, if 'B' is not the end point of the circuit 'B' will then send to 'C' a blue alarm indicator. As you can see, a signal not making it between two pieces of equipment can cause 3 (or more) alarms. Yellow red blue alarm alarm alarm |-----| |-----| |-----| | |-------X-------->| |---------------->| | | A | | B | | C | | |<----------------| |<----------------| | |-----| |-----| |-----| I hope this helps. Don Pobanz > Regards > > Richard _______________________________________________ Sign up now for AstriCon 2007! September 25-28th. http://www.astricon.net/ --Bandwidth and Colocation Provided by http://www.api-digital.com-- asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
