INTERNATIONAL  TELECOMMUNICATION  UNION

		     ITU-T RECOMMENDATION SUMMARY


Rec. No. : X.39

Title :	Procedures for the exchange of control information and user 
	data between a facsimile packet assembly/disassembly (FPAD) 
	facility and a packet mode data terminal equipment (DTE) or 
	another  FPAD

Study Group : VII - Data Communications Network

Version : New

Date of adoption : 1992

Notes : 


The establishment in various countries of public data networks 
providing packet-switched data transmission services creates a need to 
produce standards to facilitate international interworking.

Recommendation X.39 defines:

	a) the procedures for the exchange of FPAD control 
	   information and user data;

	b) the manner in which user data is tranderred;

	c) the procedure for the control of the FPAD via FPAD 
	   messages;

	d) the formats of data fields which are transferable on a 
	   virtual call.

The Recommendation X.39 procedures shall apply to the 
Recommendation X.25 interface between the DCE and the packet mode DTE.



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