TIA TSB-147-2004
电信-多线终端系统-PBX交换设备要求在标准TIA-464-C 及ETSI ES 201 168 Version 1.1中 1.1版

Telecommunications Multiline Terminal Systems Comparison of PBX Transmission Requirements in Standards TIA-464-C and ETSI ES 201 168 Version 1.2.1


TIA TSB-147-2004




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标准号
TIA TSB-147-2004
发布
2004年
发布单位
美国电信工业协会
 
 
适用范围
Over the last decade, continuing telecommunications improvements have brought the continents closer together – digital signaling allows calls to be established in less than a second and digital transmission has improved voice quality. Such changes have made it convenient to call anywhere in the world without a thought being given to past difficulties in completing such calls with acceptable transmission quality.

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