Cabletron Systems STHI User Manual page 22

Intelligent token ring stackable hub
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Operating Specifications
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.
RJ45 Plug
8
1
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
Figure 2-2. RJ45 to DB25 Connector Pinout
RJ45 Plug
8
1
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
Page 2-4
Figure 2-3. RJ45 to DB9 Connector Pinout
Female 25 Pin D-Shell
13
25
1
14
Female DB-9
5
1
9
6

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