1、I 232b414 O006008 I m .- Page I TL03-10 E Recommendation T/L 03-10 (Edinburgh 1988) SYNCHRONOUS FRAME STRUCTURES, FRAME ALIGNMENT AND CRC PROCEDURES USED AT PRIMARY AND SECONDARY HIERARCHICAL LEVELS Recommendation proposed by Working Group T/WG 12 “Transmission and Multiplexing” (TM) Text of the Rec
2、ommendation adopted by the “Telecommunicafions” Commission: “The European Conference of Posts and Telecommunications Administrations, considering - that it is necessary to dehe frame structures at primary and secondary hierarchical levels, - that it is desirable to specify frame alignment and CRC pr
3、ocedures at these levels, - that the relevant CCITT existing Recommendations contain various options and differences which are necessary on a worldwide basis, - that CEPT Administrations support the harmonization of telecommunication equipment and systems which could lead to a reduction in the devel
4、opment and production costs for the manufacturers supplying equipment to several countries, recommends that member Administrations adhere to the specifications contained in this Recommendation.” Recommendation T/L 03- 10 corresponds to the following CCITT Recommendations: - Recommendation G.704: “Sy
5、nchronous frame structures used at primary and secondary hierarchical levels with the following modifications: - delete Q 2.1 and 2.2 associated tables; - delete Q 3 and 4 and associated tables; - delete sections a) and b) in the Annex. Recommendation G.704” with the following modifications: - delete Q 2 and 3 and Figure 1lG.706. - Recommendation G.706 : “Frame alignment and CRC procedures relating to basic frame structures defined in Edition of January 30, 1989 2 7 I
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