Using TCAP/MAP between msc-hlr

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.