Connector Descriptions
The following shows the 78-pin and 25-pin, D-shell, male connectors on the optional 8-Port Direct Modem
Attach cable and the Multiport Interface cable.
Table 4-1 and Table 4-2 show the pin assignments for the 78-pin connector on the 8-port adapter and the
corresponding pin assignments for the 25-pin connectors on the cable or breakout box.
Table 4-1. RS-232 D-Shell Connector Pin Assignment
Signal Name
78-Pin Connector
25-Pin Connector0 1 2 3 4 5 6 7
TXD 40 04 66 69 73 55 76 58 2
RXD 02 64 28 31 54 75 57 78 3
RTS 01 63 27 30 34 16 37 19 4
CTS 61 25 48 51 15 36 18 39 5
DSR 42 06 68 71 72 33 53 14 6
GND 07 08 11 43 67 70 67 70 7
CD 22 45 09 12 74 56 77 59 8
DTR 60 24 47 50 35 17 38 20 20
RI 30 65 29 32 49 52 10 13 22
TX CLK IN 23 46 15
TX CLK OUT 41 05 24
RX CLK IN 62 26 17
HRS 21 44 23
Table 4-2. RS-485 D-Shell Connector Pin Assignment
Signal Name
78-Pin Connector
25-Pin Connector0 1 2 3 4 5 6 7
TXDA 01 63 27 30 34 16 37 19 4
TXDB 40 04 66 69 73 55 76 58 2
RXDA 61 25 48 51 15 36 18 39 5
RXDB 02 64 28 31 54 75 57 78 3
GND 07 08 11 43 67 70 67 70 7
Cables and Connectors 4-3
