wireshark, viewing Abis communication

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Nordin bouchtaoui at gmail.com
Fri Jul 31 07:57:58 UTC 2009


> no. SAPI only exists in E1 based A-bis.
>   

Pfff, I was going crazy...

> A-bis over E1 is what the BS-11 uses.  ip.access has their own proprietary
> protocol stacking and A-bis dialect.  There is no public documentation about
> it, apart from what we deducted from protocol traces and implemented in OpenBSC
> / wireshark and put into the OpenBSC wiki.
>   

Damn, did you had a lot of cola and chips? :p

> In any case, the Layer 2 (Q.921 on E1, with TEI and SAPI) is completely 
> uninteresting.  All you should care about is layer 3 (12.21 OML and 08.58 RSL).
>   

Yeah, I kind of figured that out now.





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