Cabletron Systems STHI - Manual (Page 22)

Operating Specifications
Page 2-4
Shield continuity is maintained by contacts within the female RJ45 that
contact the metallic casing of the male RJ45 on the STP lobe cable.
The COM port is a female RJ45 connector supporting EIA RS232C
connections via cables with pinout configurations as specified in Figure
2-2 or Figure 2-3.
Figure 2-2. RJ45 to DB25 Connector Pinout
Figure 2-3. RJ45 to DB9 Connector Pinout
Transmit...... Pin 1 ....... to ......Pin 3 ...... Receive
Receive...... Pin 4 ....... to ......Pin 2 ...... Transmit
Signal Ground...... Pin 5 ....... to ......Pin 7 ...... Signal Ground
Data Carrier Detect...... Pin 2 ....... to ......Pin 20 ...... Data Terminal Ready
Data Terminal Ready...... Pin 6 ....... to ......Pin 5 ...... Clear to Send
RJ45 Plug
1 8 25 14
1 13
Female 25 Pin D-Shell
Transmit..... Pin 1 ....... to ......Pin 2 ........ Receive
Receive..... Pin 4 ....... to ......Pin 3 ........ Transmit
Signal Ground..... Pin 5 ....... to ......Pin 5 ........ Signal Ground
Request to Send..... Pin 7 ....... to ......Pin 7 ........ Ready to Send
Clear to Send..... Pin 8 ....... to ......Pin 8 ........ Clear to Send
RJ45 Plug
1 8
1 5
9 6
Female DB-9