INTERNATIONAL  TELECOMMUNICATION  UNION

		     ITU-T RECOMMENDATION SUMMARY


Rec. No. : F.80

Title :	Basic requirements for interworking relations between the 
	international telex service and other services

Study Group : I - Services

Version : New

Date of adoption : 1991

Notes :	


Providers of new and evolving non-voice services are aiming to offer 
communication relations with the international telex service by 
introducing interworking functions. The provision of such interworking 
functions must not reduce the perceived Quality of Service or modify 
the operational procedures of the international telex service. 
Therefore, when defining interworking functions, the general 
characteristics of the international telex service, as well as its 
operational provisions, listed in Recommendations F.59 and F.60, must 
be considered.

Since the specific interworking procedures are defined in detail within 
numerous Recommendations, it seems beneficial to summarize the basic 
requirements for interworking relations between the international 
telex service and other services within one single Recommendation.

Recommendation F.80 defines the basic requirements which should be 
observed when defining interworking relations between the 
international telex service and other services. The aim of 
Recommendation F.80 is to ensure that by implementing such 
interworking relations no negative influences arise for subscribers 
of the international telex service.

Only the perspective of a telex subscriber communicating with terminals 
of another service (via an interworking function) is considered in 
Recommendation F.80.



To order the complete text of this Recommendation, please use the 
Order Form for ITU-T Recommendations. An electronic version of this 
form is available on ITUDOC (Winword: UPI=ITU-5265; ASCII: UPI=ITU-2488).