HP rp4440 HP DTC Cabling and Racking Guide - Page 96
Adapting to a 10BaseT cabling system
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9 Adapting to a 10BaseT cabling system Adapting to a 10BaseT cabling system The 10BaseT cabling system uses 4 wires per port and provides 12 ports on a 25 pair cable (or on a 50-pin telco-like connector). The DTC provides 8 direct connect RS-232 or RS-423 ports on a 50-pin connector. The following table provides a cabling conversion using cross-connect blocks (punch down blocks) from ATT356A to 10BaseT. DTC Pin # on 50-pin connector 26 1 27 2 28 3 29 4 30 5 31 6 32 7 33 8 34 9 35 10 36 11 37 12 Port number RS-423/RS232 signal P0 - RTS P0 - CTS P0 - RXa/RD P0 - RXb/P0 - TXa/TD P0 - TXb/SGND P1 - RTS P1 - CTS P1 - RXa/RD P1 - RXb/P1 - TXa/TD P1 - TXb/SGND P2 - RTS P2 - CTS P2 - RXa/RD P2 - RXb/P2 - TXa/TD P2 - TXb/SGND P3 - RTS P3 - CTS P3 - RXa/RD P3 - RXb/P3 - TXa/TD P3 - TXb/SGND Jumpers 10BaseT Pin # on 50-pin connector 26 1 27 2 28 3 29 4 30 5 31 6 32 7 33 8 Port number RS-423/RS-232 signal Pin # on RJ45 connector P0 - RXa/RD 1 P0 - RXb/- 2 P0 - TXa/TD 3 P0 - TXb/SGND 6 P1 - RXa/RD 1 P1 - RXb/- 2 P1 - TXa/TD 3 P1 - TXb/SGND 6 P2 - RXa/RD 1 P2 - RXb/- 2 P2 - TXa/TD 3 P2 - TXb/SGND 6 P3 - RXa/RD 1 P3 - RXb/- 2 P3 - TXa/TD 3 P3 - TXb/SGND 6 90