Configure Fax Voip FSP with Callcentric

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callcentric.com is a popular SIP provider in the United States. Callcentric supports both T.38 and audio faxes. This service provider also offers phone numbers in the US/Canada and many other countries. To get an account you can register at the Callcentric website.



Configure SIP account



Username (or SIP-ID): the phone number provided by the Callcentric

Password: password

SIP Registrar Server: callcentric.com



Configure Outgoing Call Routing



On the General page, in the Dial on Line area, check that the following settings are used:


VOIP Protocol: SIP

Dial on SIP Server: callcentric.com

Username: the phone number provided by the Callcentric



On the Fax page, in the Fax Support area, check that T.38 fax option is selected. in the T.38 Fax Settings area, specify Switch to T.38 after 0 seconds.




Configure Incoming Call Routing


On the Fax page, in the Fax Support area, check that T.38 fax option is selected.