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by Nexxxeh 504 days ago
Like this software? Not that I've seen, but there devices that offer that functionality.

VoIP GSM gateways, sometimes with basic PBX functions, are absolutely a thing. Yealink do some (that I've not used) that act as a SIP registrar, you can basically log SIP clients straight into it.

And there are more heavy duty options that take 16+ SIM cards that are basically a rack-mountable mobile call centre.