Hi Ivan,
On Fri, Oct 09, 2020 at 10:51:02PM +0300, Ivan Babanov wrote:
Regarding SABME message it's correct behaviour, I checked twice, BSC initializes link establishment and BTS responds with UA
I never worked a lot with Nokia, so you may be right. In the 3GPP specs (and as implemented in Siemens), the BTS initiates the data link to the BSC.
Today I was digging in dahdi-linux docs again and I see that it uses BKL mechanisms in the kernel. Is it still valid? Because BKL was removed from kernels starting from 2.6.39
I'm not sure what you are referring to. I have kernels up to 5.8.0 running with DAHDI without any problems.
What linux kernel do you use on your server with dadhi E1 adapters?
mostly whatever version Debian 10 (amd64) ships. I then build DAHDI for that kernel from source. https://github.com/osmocom/dahdi-linux has a few fixes for recent kernel versions that upstream doesn't yet have merged to master. But if upstream compiles on your kernel, you don't need those patches.