We want to make sure that every service we offer as part of Ninja Number works perfectly. That being said, there are a lot of issues with sending faxes through Voice over IP (VoIP) technology, so much that no provider can guarantee 100% reliability when sending or receiving faxes. In fact, the quality of sending faxes on VoIP is so poor that a lot of VoIP service providers recommend that if you want to send and receive faxes, you should keep a regular telephone line solely for that purpose.
If we can't guarantee 100% reliability, we don't want to offer the service. The industry is moving away from faxes and relying more on scanning and emailing documents, and that's what we recommend.