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Adapting to a 10BaseT cabling system
9
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
Port number -
RS-423/RS232
signal
Jumpers
10BaseT
Pin # on
50-pin
connector
Port number -
RS-423/RS-232
signal
Pin # on RJ45
connector
26 P0 - RTS
1 P0 - CTS
27 P0 - RXa/RD <---------> 26 P0 - RXa/RD 1
2 P0 - RXb/- <---------> 1 P0 - RXb/- 2
28 P0 - TXa/TD <---------> 27 P0 - TXa/TD 3
3 P0 - TXb/SGND <---------> 2 P0 - TXb/SGND 6
29 P1 - RTS
4 P1 - CTS
30 P1 - RXa/RD <---------> 28 P1 - RXa/RD 1
5 P1 - RXb/- <---------> 3 P1 - RXb/- 2
31 P1 - TXa/TD <---------> 29 P1 - TXa/TD 3
6 P1 - TXb/SGND <---------> 4 P1 - TXb/SGND 6
32 P2 - RTS
7 P2 - CTS
33 P2 - RXa/RD <---------> 30 P2 - RXa/RD 1
8 P2 - RXb/- <---------> 5 P2 - RXb/- 2
34 P2 - TXa/TD <---------> 31 P2 - TXa/TD 3
9 P2 - TXb/SGND <---------> 6 P2 - TXb/SGND 6
35 P3 - RTS
10 P3 - CTS
36 P3 - RXa/RD <---------> 32 P3 - RXa/RD 1
11 P3 - RXb/- <---------> 7 P3 - RXb/- 2
37 P3 - TXa/TD <---------> 33 P3 - TXa/TD 3
12 P3 - TXb/SGND <---------> 8 P3 - TXb/SGND 6
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