T 38 Compatible Fax Machine

The t 38 recommendation defines the use of both tcp and udp to transport t 38 packets.

T 38 compatible fax machine.

Looking for a t 38 compatible device. In theory this should work well because the data network is designed for the transmission of data where the voice network wasn t. T 38 and internet faxing. For the g3 fax machine on an analog line this process will be transparent.

Scroll down to the bottom of the screen and look for audio configuration. Fortunately most newer fax machines utilize a newer t 38 protocol. The pap2 and the pap2t do not support the t 38 fax protocol. We have compiled an extensive list of platforms and how to configure those devices to perform t 38 fax over ip foip.

Setting up your fax machine. Implementations tend to use udp due to tcp s. One solution send to newer fax machines. T 38 is described in rfc 3362 and defines how a device should communicate the fax data.

By default the selection for fax is already enable and set. 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. 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.

As a result these machines can more reliably receive faxes sent over voip. 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. 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.

Log into the spa s web based setup page and click the line tab you want to setup your fax machine. That is why the t 38 protocol was implemented. Most voip gateways and ata s now support t 38 reliably. A t38 compatible ip pbx or application is necessary to send fax documents over a data network to standard fax machines.

In the diagram above both the gateway and the fax machine behind the gateway would have to be t 38 capable. A configuration guide is included for each device we certify as t 38 fax compatible. T 38 defines how to deal with faulty lost or repeated data packets.