Configure Fax Voip T.38 Modem with Callcentric
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.
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, make sure that Send T.38 re-invite option is selected.
Configure Incoming Call Routing
On the Fax page, in the Fax Support area, make sure that T.38 fax option is selected.
