SLI failure

[flaplataing]

I have an omnipcx office, with an analog card interface SLI (16 ports) and 4 of them are out of service. I have ring tone, but no line signal. I saw it has
an IC L3235N, but, does anybody know what can it be?

[tot3nkopf]

Do you have licence for all your analog users? Are your users defined on those 4 ports?

[flaplataing]

Yes, they were working for 2 years. Suddenly, I don't have battery voltage at ports 5 - 8 (no current, no tone signal...), but I do have ring voltage. So, all damaged ports are from the same daughter board of the SLI 16 board.

[tot3nkopf]

Do you have another SLI16? Try to swisch them and see the result. You must isolate the cause of your problem (software config, short on cabling, damaged ports , etc), See in PM5 if you can put these ports in service by unticking out of serv box.
Good luck.

[flaplataing]

I switched the SLI board, but the failure is still in the same board. So, it´s not a config problem, and the backplane seems to work ok. So, I think the ports are damaged....do i have anything to do with the card or the only thing to do is to buy a new one?

[frank]

Did you check the cables maybe !?

[flaplataing]

Oh, yes, i´ve checked them. Also, I connected a phone directly to the board, and i had no battery voltage. So, I think it may be some hardware failure, and i guest if it cuold be any IC or transistor. But, why all ports from the same daughter card have the same problem?

[frank]

Did you try to move the board to another slot ?

[flaplataing]

Yes, I tried. I switched the boards. The faulty board was on slot 1 and i tried it on slot 4. The problem is now on slot 4.

[frank]

OH.. if the problem of voltage follows the board, RMA it.
Something must be bad