Sagemcom’s XmediusFAX and OpenLine Fax Over IP SIP Solutions

SIP Compliant: Designed to meet SIP RFC specifications with compliancy to fax specific requirements.

SIP Protocols: T.38 uses standard SIP call setup protocols (SIP TCP, SIP TLS, SIP UDP) as well as H323. XMediusFAX and OpenLine support these IP Call Control protocols.

FoIP Protocol: XMediusFAX and OpenLine solutions deploy the standardized ITU T.38 FoIP protocol specifically designed to carry fax traffic over IP networks in real time. XMediusFAX and OpenLine have been successfully deploying FoIP solutions using T.38 since 2002.

*Although G.711 is widely deployed for voice applications, it is not regarded as the fax protocol of choice as it was designed to carry voice over IP.

The diagram below illustrates an XMediusFAX and/or OpenLine deployment in a SIP trunking environment. The left side illustration Customer Managed / Owned shows Sagemcom’s XmediusFAX server (software only) and Openline appliance on customer premise. (Note: Both solutions are not required). The red line reflects the internet connection provided by the Internet Telephony Service Provider (ITSP) passing through the demarcation point. The right illustration Carrier Managed / Owned shows connectivity to the Session Border Controller (SBC), SIP Trunk Provider, SIP Capable PBX and eventually the traditional PSTN.

Connectivity to the PSTN, as well as all associated hardware maintenance, rests with the Carrier / ITSP who manages the PSTN gateway functionality inherently contained within a SIP capable PBX. Once T.38 based FoIP traffic is received in the ITSP network via SIP trunk, the SBC controls the data flow of sessions (i.e., fax calls). The SBC controls the signaling as well as the processes for setting up, conducting, and tearing down the fax call or any other form of interactive media communications.

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