
Voice over IP (VoIP) is a general term for placing telephone calls over data networks. The
NET SatisFAXtion fax server uses Session Initiation Protocol (SIP) and T.38 (International
Telecommunication Union publication T.38) protocol to set up calls, and to transmit fax data
respectively.
2.2.2.1ANoteonFaxServerPortsversusMediaGatewayPorts
The ports you see in NET SatisFAXtion are ‘virtual’ ports. They do not correspond with the physical ports
on the media gateway. Outbound ports are allocated lowest port number to highest (ascending) and
inboundportsareallocatedfromhighesttolowest(descending).
2.2.2.2ConfiguringNETSatisFAXtiontouseaVoIPdevice
NET SatisFAXtion can use a variety of VoIP devices and/or SIP providers to send and receive faxes. VoIP
devices are initially configured in the ‘ReDetect Fax Devices’ utility. You can configure VoIP device
parameters afterwards in the ‘Change Server Settings’ utility, located at Start ⇨ Programs ⇨ NET
SatisFAXtion ⇨ Change Server Settings. Click on the ‘Fax Hardware Settings’ button, select a port and
clickAdvanced.
ClickMoreSettingstooverridetheIPaddressusedforSIP.
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