Hi, I'm interested in inspecting TCAP/MAP interactions between hlr-msc, but it seems osmo-msc osmo-hlr are using a custom protocol(GSUP). Are there any options to do so?Any suggestion would be appreciated. I saw some references to RestComm https://github.com/RestComm/jss7, moji-mobile https://github.com/moiji-mobile/tcap and signerl https://gitea.osmocom.org/erlang/signerl(seems abandoned), any of these combinations would work with osmo-msc/hlr? A side question: is GSUP the only custom protocol used in osmocom gsm network?all other interactions are based on 3GPP?
Best Regards, amir.
Hi Amir,
On Sun, Apr 17, 2022 at 11:04:02AM +0430, Amir Hossein wrote:
I'm interested in inspecting TCAP/MAP interactions between hlr-msc, but it seems osmo-msc osmo-hlr are using a custom protocol(GSUP).
correct.
Are there any options to do so?Any suggestion would be appreciated.
Unfortuantely not. We know several people who have developed GSUP to MAP translators, but unfortunately none of those users was willing to release their software as open source, like we do in osmocom. Until people with a need for TCAP/MAP in Osmocom networks will contribute the related code, it will not
A side question: is GSUP the only custom protocol used in osmocom gsm network?all other interactions are based on 3GPP?
There are some custom interfaces, for example the pcu_sock between osmo-bts and osmo-pcu, or the MNCC interfae between osmo-msc and osmo-sip-connector.
But the A, Gb, Lb, Iu, Gp, etc. interfaces are all as specified by 3GPP.
Abis is modified to work over IP (not covered by 3GPP specs even today), see https://downloads.osmocom.org/docs/latest/osmobts-abis.pdf
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Amir Hossein -
Harald Welte