The CCITT, considering that standardization of signalling systems to be used for international manual and automatic working on analogue leased circuits brings advantages to Administrations, manufacturers and users; that manual and automatic operation of international leased circuits require different technical arrangements.
ITU-T Q.8 SPANISH-1988由国际电信联盟 IX-ITU 发布于 1988。
ITU-T Q.8 SPANISH-1988 在中国标准分类中归属于: M11 通信网技术体制,M12 通信网编号、信号、接续,M42 通信线路设备。
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