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☎ Max.Suraev at fairwaves.ruCall-by-IMSI got to be supported by BTS, which is not normally the case, however OpenBTS fork from Fairwaves have testcall function which does just that. In general - mobile-terminated call can "by IMSI" because for mobile phone there's no difference in how it was reached exactly_ as long as BTS exposes that functionlity. For mobile originated calls I think it can be implemented on BTS side if you simply use IMSI as a phone number in authentication db/sip backend of OpenBTS. -- best regards, Max, http://fairwaves.ru