Re: Make phone calls using IMSI

Sebastian Komorowski bajtelo at
Mon Mar 3 14:28:56 UTC 2014

I have USRP with OpenBTS. I can now make phone calls from phone to phone i this two MS is connected to my BTS. 

Can you explain more precisely how to make phone calls using IMSI and OpenBTS?

Secondly - how i can input (enter) IMSI to mobile phone to make phone calls successfully. Software in phones supports functions like this? 


Dnia 3 marca 2014 14:41 ☎ <Max.Suraev at> napisał(a):

> Call-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.

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