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5 NTT公司对数模兼收的市话电缆的串音特性测试 为了摸清市话电缆对数据通信的承载能力，日本NTT公司在前些年对模拟和数字通信回路兼收的市话电缆，进行了大量的测试工作。现对其测试结果进行介绍。 1． 市话电缆线对的串音途径 在数、模混合电容的市话电缆内，线对间的串音途
5 NTT’s Crosstalk Test on Analog-to-Digital Cables In order to find out the capacity of local telephone cables to carry data communications, Japan NTT Corporation conducted a large number of local telephone cables that used both analog and digital communication circuits in previous years The test work. Now the test results are introduced. 1. Local telephone cable pair crosstalk in the number of mixed mode local telephone cable, cable crosstalk between the way