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INTERNATIONAL TELECOMMUNICATION UNION
ITU-T RECOMMENDATION SUMMARY
Rec. No. : E.331
Title : Minimum user-terminal interface for a human user entering
address information into an ISDN terminal
Study Group : II - Network Operation
Version : New
Date of adoption : 1991
Notes :
Recommendation E.331 is intended to achieve a degree of world-wide
uniformity in the basic procedure for a human user inputting address
information such as destination numbers to an ISDN terminal. It is
desirable for a user employing these basic procedures to be able to
establish an ISDN connection using any ISDN terminal without requiring
specific knowledge about the characteristics of that terminal. It is
intended to cover the long-term requirements rather than to meet
intermediate, change-over needs. It provides for the same procedure
for the two kinds of signalling: functional (en bloc) signalling
between the terminal and the network, and stimulus (overlap)
signalling between the user and the network (as in the PSTN).
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).