T 38 Compatible Fax Machine

All platforms on this page have been rigorously tested and certified as compatible with our service by our t 38 fax interoperability team.

T 38 compatible fax machine.

A configuration guide is included for each device we certify as t 38 fax compatible. One solution send to newer fax machines. That is why the t 38 protocol was implemented. Log into the spa s web based setup page and click the line tab you want to setup your fax machine.

In the diagram above both the gateway and the fax machine behind the gateway would have to be t 38 capable. The connection of a normal fax machine to a t 38 compatible voip connection is via an ata analog telephone adapter or a special connection on the router which must also be t 38 capable. T 38 defines how to deal with faulty lost or repeated data packets. Many businesses rely on fax machines and fax machines are designed in a way that they cannot read data the same way a computer with a modem can.

We have compiled an extensive list of platforms and how to configure those devices to perform t 38 fax over ip foip. Most voip gateways and ata s now support t 38 reliably. T 38 and internet faxing. As a result these machines can more reliably receive faxes sent over voip.

The pap2 and the pap2t do not support the t 38 fax protocol. In theory this should work well because the data network is designed for the transmission of data where the voice network wasn t. The t 38 protocol was designed to provide a raw data method to transmit fax s. The gateway works by taking your fax machine s signal and converting it into an internet compatible one rather than first digitizing it into an audio signal.

A t38 compatible ip pbx or application is necessary to send fax documents over a data network to standard fax machines. The t 38 protocol is a standard for fax machines in which the sender the receiver or both the sender and receiver are using voip. By default the selection for fax is already enable and set. Since the vast majority of fax machines in existence today do not have t 38 built in any fax machine starts off the call as a.

This is then sent either to a t 38 enabled end point such as fax machine or fax server or another t 38 gateway that converts it back to pstn pcm or analog signal and terminates the fax on a t 30 device. Setting up your fax machine. T 38 is described in rfc 3362 and defines how a device should communicate the fax data. Implementations tend to use udp due to tcp s.

Scroll down to the bottom of the screen and look for audio configuration. Looking for a t 38 compatible device. The t 38 recommendation defines the use of both tcp and udp to transport t 38 packets.