3 ms·
If I understand what you're asking, I use an Obihai VoIP adapter so I can use any old phone, but there are also a variety of IP phones from Cisco, Obihai, etc.
by js2 4y ago
If I understand what you're asking, I use an Obihai VoIP adapter so I can use any old phone, but there are also a variety of IP phones from Cisco, Obihai, etc.