Asterisk or FreeSwitch
We have a lot of experiences with VoIP. Concrete Asterisk, Freeswitch, Patton Smartnodes, Aastaro and Snom Hardware.
In case you have problems with an existing PBX it might be worth to contact us.
In case you plan to setup a new PBX and you don't want ro work remote. Don't contact us.
If you've other voip related Questions and are ready to work remote. Contact us.