T 38 Compatible Fax Machine

A configuration guide is included for each device we certify as t 38 fax compatible.

T 38 compatible fax machine.

By default the selection for fax is already enable and set. In the diagram above both the gateway and the fax machine behind the gateway would have to be t 38 capable. Implementations tend to use udp due to tcp s. Looking for a t 38 compatible device.

For the g3 fax machine on an analog line this process will be transparent. The t 38 protocol was designed to provide a raw data method to transmit fax s. T 38 and internet faxing. T 38 is described in rfc 3362 and defines how a device should communicate the fax data.

The pap2 and the pap2t do not support the t 38 fax protocol. 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. In theory this should work well because the data network is designed for the transmission of data where the voice network wasn t. In essence a t38 compatible service converts a fax to an image and then sends it to another t38 compatible fax device which converts the image back to an analog fax signal that can be fed into a standard fax machine.

Setting up your fax machine. Fortunately most newer fax machines utilize a newer t 38 protocol. The t 38 recommendation defines the use of both tcp and udp to transport t 38 packets. As a result these machines can more reliably receive faxes sent over voip.

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. All platforms on this page have been rigorously tested and certified as compatible with our service by our t 38 fax interoperability team. 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. Scroll down to the bottom of the screen and look for audio configuration.

A t38 compatible ip pbx or application is necessary to send fax documents over a data network to standard fax machines. Log into the spa s web based setup page and click the line tab you want to setup your fax machine. One solution send to newer fax machines. 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.

We have compiled an extensive list of platforms and how to configure those devices to perform t 38 fax over ip foip. That is why the t 38 protocol was implemented. T 38 defines how to deal with faulty lost or repeated data packets.