CEPT T S 60-00 E-1988 Introduction and Field of Application for Digital Local Transit and Combined Exchanges《数字本地、转接和组合交换引入和应用领域》.pdf

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1、2326434 0009062 O 60-oo Page E 1 Recommendation T/S 60-00 (Edinburgh 1988) INTRODUCTION AND FIELD OF APPLICATION FOR DIGITAL LOCAL, TRANSIT AND COMBINED EXCHANGES Recommendation proposed by Working Group T/WG 11 “Signalling, Protocols and Switching” (SPS) Text of the Recommendation adopted by the “T

2、elecornmiiiiications” Commission: “The European Conference of Post and Telecommunications Administrations, considering that - digital local, transit and combined exchanges are currently being introduced for both analogue and digital - the evolution of telecommunication networks toward ISDN, with dig

3、ital access of customers, is now planned in - further development will lead to broadband switched digital networks with new switching technologies, - CEPT Recommendations on digital exchanges exist since long and CCITT Recommendations have been estab- telephone networks, many countries, O lished in

4、the same area, recommends that the members of CEPT when introducing digital local, transit and combined exchanges taken account of and given effect to the following set of switching systems specifications.” The reader is referred to the CCITT Recommendations in the 4.500 series (1988 edition) to whi

5、ch these CEPT Recommendations are identical, except for the indicated additions and modifications per Recommendation. This section references (indicated ) into 4.500. $1. The CEPT series of Recommendations is: T/S 60-00 instead of 4.500 T/S 61-10 instead of 4.511 T/S 61-20 instead of 4.512 T/S 61-30

6、 instead of 4.513 (Note 2) T/S 62-10 instead of 4.521 (Note 2) T/S 62-20 instead of 4.522 T/S 64-10 instead of 4.541 T/S 64-20 instead of 4.542 (Note 2) T/S 64-30 instead of 4.543 T/S 64-40 instead of 4.544 (Note 2) Note 1. CCITT Recommendations Q.551 up to 4.554 are not considered. Note 2. No CEPT text available yet, number is only reserved. O Edition of January 15, 1989 ,-= ,