Product specifications

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
Pi{
2 25 TXD
Pair
{
7 59 GND
Pair {
3 26 RXD
P
a
i
r
{
7 60 GND
Pi{
6 27 DSR
Pair
{
20 61 DTR
Pair {
5 28 CTS
P
a
i
r
{
4 62 RTS
25-pin
MP
Number
Twisted
Pairings
25-pin MP
Pin Number
68-pin
Pin Number
Partial Modem
Control Signal
8
Pi{
2 29 TXD
Pair
{
7 63 GND
Pair {
3 30 RXD
P
a
i
r
{
7 64 GND
Pi{
6 31 DSR
Pair
{
20 65 DTR
Pair {
5 32 CTS
P
a
i
r
{
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.