1、232b4L4 000bOL7 2 I Page 1 TL03-15 E Recommendation T/L 03-15 (Edinburgh 1988) DIGITAL MULTIPLEX EQUIPMENTS FOR INTERNATIONAL INTERWORKING BETWEEN NETWORKS BASED ON DIFFERENT DIGITAL HIERARCHIES Recommendation proposed by Working Group T/WG 12 12 Transmission and Multiplexing” (TM) Text of the Recom
2、mendation adopted by the “Telecommunications” Commission: “The European Conference of Posts and Telecommunications Administrations, considering - that international interworking between networks using different digital hierarchies is based on the following hierarchy: 2,048; 6,312; 44,736; 139,264 Mb
3、itls, to the same hierarchy, namely: 2,048 to 6,312 Mbit/s and 44,736 to 139,264 Mbit/s, be standardized, - that digital multiplex equipments are used to connect levels of this interworking hierarchy which do not belong O - that the installation and operation of digital multiplex equipments from dif
4、ferent origins require that they should recommends that member Administrations adhere to the specifications for digital multiplex equipments contained in this Recom- mendation.” Recommendation T/L 03-1 5 corresponds to the following CCITT Recommendations: - Recommendation G.747 : “Second order digital multiplex equipment operating at 6,3 12 kbit/s and multiplexing - Recommendation G.755 : “Third order digital multiplex equipment operating at 139,264 kbit/s and multiplexing three tributaries at 2,048 kbit/s”. three tributaries at 44,736 kbit/s”. Edition of January 30, I989
