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INTERNATIONAL TELECOMMUNICATION UNION
ITU-T RECOMMENDATION SUMMARY
Rec. No. : F.104
Title : International leased circuit services - customer circuit
designations
Study Group : I - Services
Version : New
Date of adoption : 1991
Notes :
CCITT Recommendation M.140 (Designations of international circuits,
groups, group and line links, digital blocks, digital paths, data
transmission systems and related information) specifies a scheme for
the designation of international routes.
The designation scheme is based on a layered approach with:
layer 1 - a unique identification providing limited
information;
layer 2 - additional information that must be known at both
termination of the route; and
layer 3 - (optional) - bilateral information not the subject
of international standardization.
Recommendation F.104 precises the way in which Recommendation M.140 is
applicable to customer international circuit designations.
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).