Configure Fax Voip Softphone with T38FAX

T38FAX service allows you to send and receive T.38 faxes. This service provider also offers phone numbers in the United States.

T38FAX Sign Up


Configure SIP account

SIP account


Username (or SIP-ID): the phone number provided by T38FAX

Password: password

SIP Registrar Server:


Configure Outgoing Call Routing

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:

Username: the phone number provided by T38FAX


General Settings


Automatic Fax Reception

When configuring your incoming rule, make sure that T.38 support option is selected.


Incoming Call Routing


Send or Receive T.38 fax

Make sure that T.38 FAX option is enabled in the main window.


T.38 Fax