NT7D16 Data Access card Page 509 of 906Circuit Card Description and InstallationCablingSeveral cabling schemes are possible for both AILC and RILC modes.Typical capacitance for 24- and 26-gauge cables is shown in the Tables 168and 169. RS-232 and RS-422 transmission distance is limited by the electricalcapacitance of the cable. Low-capacitance cable carries a digital signalfurther than a high-capacitance cable.Figure 98 on page 510 shows the cabling choices available. It includescabling with the RS-232-C cable, associated patch panel, the RJ-11, and theoctopus cable. Each scheme can be tailored to suit individual needs, andspecific alternatives are shown in later figures.Table 168RS-232-C maximum line capacitance 2,500 μFGauge Capacitance per foot (μF) Max distance24 24 10426 15 166Table 169RS-422 maximum line capacitance 60,000 μFGauge Capacitance per foot (μF) Max distance24 24 250026 15 4000
