Those who are faced with procuring a new PBX often ask themselves the question: "ISDN or VoIP already?“ Many would like to decide for VoIP, but don't want to be without the still unparalleled reliability of ISDN. It does not matter which VoIP PBX (Windows Soft PBX or Asterisk system) or which SIP provider you choose. The questions asked are almost always the same:
These question could not be satisfactorily answered previously. Previously!
- How do I connect the VoIP PBX to the ISDN trunk line?
- Where do I connect my fax machine?
- Is the reliability of the VoIP provider high enough today to put one‘s trust in it as a company in the future?
- Is there a fallback from SIP provider to the ISDN trunk line?