Abis over IUA decoding

Hi! I have capture file with Abis packets over IUA/SCTP. But the Abis packets are decoded incorrectly because Q.921 SAPI values are used by default in DLCI Parameter of IUA packets. I can't find how to use the GSM SAPI values in DLCI Parameter of IUA packet.

How the Abis messages that contained in IUA packets can be correctly decoded?

Thank You!

abis gsm

asked 03 Aug '13, 19:04

Volodymyr
11●1●1●2
accept rate: 0%

edited 05 Aug '13, 01:38

grahamb ♦
19.8k●3●30●206

One Answer:

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You can try to change the preference of LAPD to use GSM SAPI:s

permanent link

answered 04 Aug '13, 08:49

Anders ♦
4.6k●9●52
accept rate: 17%

I tried this for LAPD but it doesn't changes the SAPI settings for IUA and Abis packets still displayed incorrectly. So IUA needs it's own option for SAPI.

(05 Aug '13, 01:29) Volodymyr

Open a bug report supplying an example capture file.

(05 Aug '13, 02:58) Anders ♦

The abillity to dissect Abis over IUA was added in http://anonsvn.wireshark.org/viewvc/viewvc.cgi?view=rev&revision=51171

(06 Aug '13, 21:52) Anders ♦

I've opened a bug report #9017 an now it resolved and fixed. Thanks a lot!

(07 Aug '13, 00:04) Volodymyr

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gsm ×37
abis ×2

question asked: 03 Aug '13, 19:04

question was seen: 3,432 times

last updated: 07 Aug '13, 01:40

Abis over IUA decoding

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