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Submitted by geo on Wed, 01/30/2008 - 22:47.
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Vonage and other VoIP providers in the U.S. support the ability to add fax services or use your existing fax machine with a VoIP box.

When coupled with a Junxion box, the primary limiting factor of VoIP faxing becomes the upload speed. Vonage recommends having at least a 90k upload speed to make a successful connection. When using a cellular modem card, the upload speed can be significantly less than a high-speed land connection.

Usually, receiving faxes with a cellular modem card is not a problem, but (because of the upload speed) sending faxes can be.

If you are unable to send or receive faxes, here are a few things to try:

  • Change your bandwidth usage. Vonage offers a Bandwidth Saver feature that may be able to buffer the uploaded data more efficiently. Click here for more information.

  • Some cellular modem cards have faster upload speeds than others. Make sure you're using the card that will give you the fastest upload speed based on your location and carrier.