|
|
|
|
|
|
by pjc50
3698 days ago
|
|
|
It's telco VOIP. Anyone can get it, e.g. https://www.sipgate.co.uk/basic/ And there are various providers which will let you do 'trunking' into the phone system, so you can have any number of handsets with the same origination number appearing on outgoing caller ID. |
|
|