... , and equidirectional 64kbit/s interfaces.For Datacom: V.24/RS232/V.28, V.35, V.36, X.21, RS ... 120Ω, 26dB gainReflection loss >18dB within 50Hz3100kHz.(6) Signal structure(6.1) Non-frame structure(6.2) Frame structure: PCM30, PCM31, PCM30CRC ... direction.Rate: 1.2,2.4,4.8,9.6,14.4,19.2,38.4,48,56(kbps ... .2k,38.4k,57.6kbpsData structure: Word length: 5,6,7,8bitsStop bit: 1,2bitsOdd-even check: odd, even ...