34
DECserver 900GM Installation
Connector Pin Assignments (Cont.)
Table 7 (Cont.) 68-pin to Eight 25-pin DB Octopus Pinout
25-pin
MP
Number
Twisted
Pairings
25-pin MP
Pin Number
68-pin
Pin Number
Partial Modem
Control Signal
7
P i
{
2
25
TXD
Pair
{
7
59
GND
Pair {
3
26
RXD
Pair {
7
60
GND
P i
{
6
27
DSR
Pair
{
20
61
DTR
Pair {
5
28
CTS
Pair {
4
62
RTS
25-pin
MP
Number
Twisted
Pairings
25-pin MP
Pin Number
68-pin
Pin Number
Partial Modem
Control Signal
8
P i
{
2
29
TXD
Pair
{
7
63
GND
Pair {
3
30
RXD
Pair {
7
64
GND
P i
{
6
31
DSR
Pair
{
20
65
DTR
Pair {
5
32
CTS
Pair {
4
66
RTS
NOTES: On the 68-pin connector, tie pins 33 and 68 together to enable the
software to identify the cable.
The wire size should be 28GA or 26GA unshielded twisted pair.
