Dialogic 6.2 ユーザーズマニュアル

Processing Media Using the T.38 Protocol

November 2009

239

While the method of transport is different, IP environments support 

the functionality of these elements.

There are two types of devices used to implement T.38: an endpoint 

and a T.38-aware gateway. TR1034-based applications form 

endpoints. The following diagram shows how they support a likely IP 

fax scenario:

The endpoint uses the T.30 protocol to negotiate the connection and 

performs the image conversion. The gateway simply passes the fax 

between a PSTN and IP connection. 

Brooktrout

Fax Server

Receiving

Fax Machine

Scaling/

transcoding

T.30 /

V.34

T.30 /

V.34

 

 

PSTN

Brooktrout

Fax Server

Receiving

Fax Machine

Endpoint

T.30 /

T.38

T.30 /

T.38

 

 

 

 

PSTN 

 

 

IP 

Gateway