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Follow on Google News | How to Fax over VoIP. Use T.38 audio codec designed for Faxing over VoIPClients in the Dallas Fort Worth market can obtain expert service when faxing over VoIP.
Original Post by Chris Pirillo Dallas-972.293.3867 or Ft Worth-817.329.5521 Set your baud rate to 9600 and turn off Error Correction Mode. The slower your Fax goes, the more likely it is to go through without errors. Most VOIP providers are unable to support the default baud of 33600 baud due to the amount of data that has to go through. Error Correction Mode was designed for faxing PSTN to PSTN. Voice over IP often has extra noise added due to jitter instabilities in the connection as it travels from one fax to another. This causes false positives for Error Correction Mode because it will cause the fax to loop over and over trying to fix these noise errors, when it can’t be fixed. This will end in a communication error usually. Use a provider that supports T.38 – T.38 is an audio codec designed for Faxing over VOIP. it allows for more detail and better looking images as well as stability by creating redundancy in the RTP stream. Set your packetization to 10 milliseconds or less. The more header there is in the stream, the less likely jitter and instabilities in your internet connection are going to cause a synchronization error. (You may need to contact your provider to make this happen if your box is locked, such as if you use Vonage.) Keep on top of your ISP. Stability in your internet connection are paramount in making sure that faxes are successful. Speed tests can help you track this. Look for an advanced speed test that offers more than just and upload and download speed. A personal favorite of mine is located at myspeed.com (Note: An up to date Java version is required) which is really nice because once you’re done, you can click on the detailed analysis link and then call up your ISP and give them the URL for the test so they can see what’s going on. When all else fails, call your VOIP provider. There may be issues in the routing of your calls that are causing problems. Only your VOIP provider’s call processing team will be able to fix this kind of thing. Have your provider test from a PSTN line and then their own VOIP line. If they can send through PSTN but not their own VOIP line, it’s a routing issue on their own end. End
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