Configure Fax Voip T.38 Modem with MondoTalk

MondoTalk SIP service provider is located in Australia. MondoTalk supports both T.38 and audio faxes. Please note that we have tested T.38 only for outgoing calls to Australia.

MondoTalk Sign Up

Configure SIP account

SIP account


Username (or SIP-ID): the username provided by the MondoTalk

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 username provided by the MondoTalk


General Settings


On the Fax page, in the Fax Support area, make sure that Send T.38 re-invite option is selected.


Fax Settings