ITU-T G.215 FRENCH-1993
模拟系统用5000km假设参考电路

HYPOTHETICAL REFERENCE CIRCUIT OF 5000 km FOR ANALOGUE SYSTEMS

ITU-T G.215 FRENCH-1993 发布历史

This hypothetical reference circuit is 5000 km long and applies to various types of carrier systems on coaxial cable and radio-relay systems, specially designed for very long international circuits. It has, for each direction of transmission, a total of: one pair of channel modulators which includes translation from the audio-frequency band to the basic group and vice versa; three pairs of group modulators, each pair including translation from the basic group to the basic supergroup and vice versa; six pairs of supergroup modulators, each pair including translation from the basic supergroup to a higher order modem and vice versa; twelve pairs of higher order modulators, each pair providing the necessary modulation stages to and from the line frequency.

ITU-T G.215 FRENCH-1993由国际电信联盟 IX-ITU 发布于 1993-01-01。

ITU-T G.215 FRENCH-1993 在中国标准分类中归属于: M42 通信线路设备。

ITU-T G.215 FRENCH-1993 发布之时，引用了标准

• ITU-T G.212 模拟系统的假设参考电路
• ITU-T G.123 国内网络的电路噪声 国际电话连接和电路的一般特性(研究12和15组)6pp
• ITU-T G.222 设计2500km载波传输系统的噪声指标
• ITU-T G.215 用于模拟系统的5000km假设参考电路

ITU-T G.215 FRENCH-1993的历代版本如下：

• 1993年01月01日 ITU-T G.215 FRENCH-1993 模拟系统用5000km假设参考电路

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标准号

ITU-T G.215 FRENCH-1993

发布日期

1993年01月01日

实施日期

废止日期

无

中国标准分类号

M42

发布单位

IX-ITU

引用标准

ITU-T G.212 ITU-T G.123 ITU-T G.222 ITU-T G.215

适用范围

This hypothetical reference circuit is 5000 km long and applies to various types of carrier systems on coaxial cable and radio-relay systems, specially designed for very long international circuits. It has, for each direction of transmission, a total of: one pair of channel modulators which includes translation from the audio-frequency band to the basic group and vice versa; three pairs of group modulators, each pair including translation from the basic group to the basic supergroup and vice versa; six pairs of supergroup modulators, each pair including translation from the basic supergroup to a higher order modem and vice versa; twelve pairs of higher order modulators, each pair providing the necessary modulation stages to and from the line frequency.