Hello Harald!

Today I was able to get hardware working. At least L2 link established and I see OML/NM messages.

Files are attached.

Briefly the problem was with ports connections. I did not expected that quad-port card requires all ports to be connected. Everything started to work after I placed dummy loopback connectors to unused ports 3 and 4.

After it I was able to check physical link with e1-prbs-test and was able to communicate with BTS.

Thank you

Babanov Ivan

пн, 12 окт. 2020 г. в 12:20, Harald Welte <laforge@gnumonks.org>:

Dear Ivan,

On Mon, Oct 12, 2020 at 12:26:22AM +0300, Ivan Babanov wrote:
> I heard that it happens on some hardware with Digium cards, I'll try
> tomorrow to change PCI slot to avoid sharing one IRQ with USB
> devices, maybe disable USB at all. If it doesn't help, I'll try a new
> server with different HW.

I'm sorry but I think you are looking at the wrong level. I doubt that
the hardware is the problem.

If you are worried about the hardware/OS/drivers, just use a loopback E1
cable between two ports and run e1-prbs-test (from osmo-e1d/contrib) on
both sides to see if you can communicate between two ports. If that
works, you can exclude any problems related to hardware or drivers.

If you have connceted span 1 + 2 via loopback, start

in one shell:
e1-prbs-test /dev/dahdi/chan/001

in another shell:
e1-prbs-test /dev/dahdi/chan/002

and check the stdout to see if they find sync in both direction.

This program sends pseudo-random bit sequences over every timeslot and
checks that the correct PRBS sequence arrives on the other side,
bidirectionally.

Regards,
Harald
--
- Harald Welte <laforge@gnumonks.org> http://laforge.gnumonks.org/
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