Tips to try out if have trouble sending faxes with Vonage VoIP. How to make it work.
VoIP isn’t the best friend of faxing because of the nature of the technology. VoIP doesn’t compress analog fax signals the way it should; the VoIP system misunderstands the fax tones for echo on the line and shuts the call down; and the issue of using “packets” of data makes for an “unreliable” stream of data necessary for fax machines to continue listening and receiving the faxes.
If you subscribe to a Vonage business acount (or sometimes regular VoIP lines from other providers), you’ll get a free additional FAX line. I used to think that this ”FAX line” service add-on was just a way or “re-packaging” the VoIP line, but apparently it’s legitimate in that it’s because faxing over VoIP takes a different protocol to make it work which the Vonage “dedicated fax lines” do use.
Usually you can get away with faxing a couple of pages on a regular Vonage broadband phone line. However, longer length faxes will fail, almost always. Here’s some tips to increase the odds of it working consistently…
- Dial *99 (to turn off the bandwidth saver mode per call) and then the destination fax number…*99-1-212-555-1212
- Set the baud rate on your outbound fax machine to 9600 or 7200 bps
- Set the fax mode on your fax machine to “OVERSEAS FAX” mode which allows for more line “noise”
- For example, most Brother fax machines have this feature for example, but it seems that you cannot set it as the default mode unfortunately
– Press MENU / SET
– Select 2 on Main Menu
– then Submenu 2 (setup send)
– then Menu Selection 9 (Overseas Mode)
– Option ON
- Turn off the ECM, error correction mode, on the outgoing fax machine
Have any other tips for getting faxing to work on Vonage, Sunrocket or other VoIP lines? Share them by posting a reply to this post.