Question 7/XI - Updating of Q-Series Recommendations
(continuation of Question 17/XI studied in 1985-1988)

Considering

(a) that CCITT Signalling Systems are generally implemented over a
relatively long period after their specifications;

(b) that field trials and the subsequent operational experience with
CCITT Signalling Systems, especially with newer systems, frequently lead
to a modification of the existing Recommendations;

(c) that the Telephone User Part of Signalling System No. 7 (TUP) is
considered to be mature and stable and has been implemented by a number
of administrationsRPOAs;

(d) that continuing study is needed to cover all necessary modifications
of the existing Q-Series Recommendations.

What revisions or modifications of the existing Q-Series
Recommendations falling within the responsibility of Study Group XI
should be recommended?