I have a cust with many TN747B's. CM1.1 Definity SI. I have been fighting with the provider on issues with the channelbank they are supplying dialtone from. Recently two CO boards 747B's went into minor alarm and are failing tests 1528 and 3999, the maintenance doc's show this as xxx-board alarms. I try to reset/busy/release etc, and they still keep coming up no board and go back into alarm. Is this bad boards or co issues?
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Co Board "NO BOARD"
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The boards are going hyperactive or insane, possibly due to a channel bank problem, but probably not. "No board" indicates an on board problem, the switch is not "seeing it". Do a "disp Circuit" and scroll to the carrier(s) with the trouble to insure that the boards are indeed administered correctly (also note suffix and vintage). Remove the boards from the switch and leave them out 15-20 minutes, in the mean time, take a butt-set and go to the frame and test the lines from the channel bank. You did not specify if they were LS (loop-start) or GS (ground-start)so I am going to assume you know the difference and know how to test them. If your line tests are successful or not will tell you the story there.
Now, take the boards you removed and swap their physical locations in the switch and see if the it recognizes them now. If there were suffix and vintage differences see if they follow now in "disp cir". If "no board" still exists then you probably have bad boards, you can further confirm this by swaping it with a known good board location and see if it fails there as well.
A busy-release or reset board does not necessarily clear an insane board, because power is never removed from the board. You have to remove it and let it "chill out" for a while and then retest.
Now, take the boards you removed and swap their physical locations in the switch and see if the it recognizes them now. If there were suffix and vintage differences see if they follow now in "disp cir". If "no board" still exists then you probably have bad boards, you can further confirm this by swaping it with a known good board location and see if it fails there as well.
A busy-release or reset board does not necessarily clear an insane board, because power is never removed from the board. You have to remove it and let it "chill out" for a while and then retest.
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Thanks phonesrus,
We found that AT&T's channel bank was going up/down all day. The weird thing was everytime it came back up it called the operator 20x times with dead calls, one after another. I think it is a bad channel bank.
Thanks again.
We found that AT&T's channel bank was going up/down all day. The weird thing was everytime it came back up it called the operator 20x times with dead calls, one after another. I think it is a bad channel bank.
Thanks again.
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