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INTERNATIONAL TELECOMMUNICATION UNION
ITU-T RECOMMENDATION SUMMARY
Rec. No. : Q.767
Title : Application of the ISDN user part of CCITT signalling
system No. 7 for international ISDN interconnections
Study Group : XI - Switching and Signalling
Version : New
Date of adoption : 1991
Notes :
ISDN international interconnections have to be realized between non
homogeneous ISDNs that differ in terms of services supported, national
network signalling system and national access protocol.
In order to perform such international ISDN interconnections, it is
required to specify unambiguously and without options:
- the service capabilities of the international signalling
system;
- the international signalling interface, i.e., the signalling
information elements and messages sent and received on the
international signalling section and the related procedures;
- all additional information, which is not specifically
signalling system related, but which is needed to absorb the
potential differences between the national networks.
Section 2 of Recommendation Q.767 describes the list of services
supported by the ISUP international interface.
Section 3 contains the definition of the international ISUP signalling
specification, in terms of exceptions/clarifications to the existing
Blue Book ISUP text.
Section 4 contains additional information to ease international ISDN
interconnections. This "Guidelines" section should be understood as a
"user's guide" for international ISDN interconnection. One of the
objectives is to highlight possible areas of difficulty and propose
standard solutions, that should be applied as far as possible by
international operators.
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 2.0: UPI=ITU-5265; ASCII: UPI=ITU-2488).