If you do not already own phone devices, there are several options available on the market to suit every need and budget. Look for VoIP phones compatible with the SIP protocol.
VoIP desk-phones is not your only choice here, however. You can also use (free or licensed) software on a smartphone or PC, or convert legacy analog devices to VoIP with the right adapter.
If you already own a PBX, then you might be in luck. Nearly all PBX devices manufactured in the last decade can support VoIP telephony, in which case you won't have to invest in new equipment. If you know the make and model of your PBX, contact us and we'll be glad to help you determine if it's compatible with our platform.