3Com 3C13755-US - Router 5642 Installation Manual

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3Com 3C13755-US - Router 5642 Installation Manual Manual pdf 93 page image

Serial Interface Cable 91between the terminal device, such as a PC or a router, and the terminal device.You can create this cable yourself, if necessary.You can use the table as a reference while distinguishing or preparing the twokinds of Ethernet cables. While preparing the Ethernet cables, follow thechromatogram given in this table to arrange the wires. Otherwise, communicationquality will be affected even though the equipment at two ends is connected.Serial Interface Cable Synchronous and Asynchronous ModeV.35 and V.24 (EIA/TIA-232) standards support synchronous operating mode,while only V.24 (EIA/TIA-232) standard supports the asynchronous operatingmode. The maximum transmission distance and baud rate of the signal vary withthe operating mode.Table 56 Straight-through Network Cable PinoutsRJ-45 SignalCategory 5twisted pair Signal Direction RJ-451 TX+ White (Orange) —> 12 TX- Orange —> 23 RX+ White (Green) <— 34 - Blue - 45 - White (Blue) - 56 RX- Green <— 67 - White (Brown) - 78 - Brown - 8Table 57 Crossover Network Cable PinoutsRJ-45 SignalCategory 5Twisted Pair Signal Direction RJ-451 TX+ White (Orange) —> 32 TX- Orange —> 63 RX+ White (Green) <— 14 - Blue - 45 - White (Blue) - 56 RX- Green <— 27 - White (Brown) - 78 - Brown - 8Table 58 Transmission Rate and Transmission Distance of V.24 (EIA/TIA-232)/V.35 CableV.24 (EIA/TIA-232) V.35Baud rate (bps)Maximumtransmissiondistance (m) Baud rate (bps)MaximumTransmissiondistance (m)2400 60 2400 1250