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f150sum.txt
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INTERNATIONAL TELECOMMUNICATION UNION
ITU-T RECOMMENDATION SUMMARY
Rec. No. : F.150
Title : Service and operational provisions for the intex service
Study Group : I - Services
Version : New
Date of adoption : 1991
Notes :
With the continuing development of the infrastructures of the networks
which currently support, amongst others, the international telex
service, it is feasible that some of these networks could support
other services operating at speeds in excess of 50 bauds and using
character sets other than those of International Telegraph Alphabet
No. 2 (ITA2).
There may be benefits to both customer and Administrations if a new
text service could be introduced that would utilize the same network
infrastructure as the international telex service.
Recommendation F.150 sets out the service and operational principles
for the introduction of a new text service, initially operating
asynchronously at 300 bit/s and using International Alphabet No. 5
(IA5).
This service will be real-time circuit switched and provide
asynchronous operation with a basic transmission rate of 300 bit/s.
The use of other transmission rates at a future date is for further
study. The service will be half-duplex in its normal mode but will
allow for full duplex operation in the transparent mode. The Intex
service will use the destination codes detailed in Recommendation F.69.
It is recommended that the national numbering scheme for the Intex
service be similar to and compatible with that used for the
international telex service.
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).