... V.24/V.28/RS232, V.35, V.36, RS449, X.21, RS485, EIA530, EIA530A, and equidirectional 64kbit/s interfaces. ... resistance: >1200Ω Unbalance bridging resistance: >750Ω.(10) Error code insertion: None, single, or ratio 10-1 ~ 10-7.Co-directional 64k Technical Index(1 ... communicationRS-449,V.361 pc9Special testing cable of data communication X.211 pc10Special testing cable of data communication V.351 pc11G ...