Cabletron Systems STS16-20R - Manual (Page 244)

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SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide Cable and Pin Information
Management Port Pin-Out
TIA/EIA-232 Modem Cable Connections
Use a standard straight-through modem cable to connect the switch’s
MANAGEMENT port to a modem.
TIA/EIA-232 Null-Modem Connections
Use a null-modem (crossover) cable shown in Figure 28 to connect the
MANAGEMENT port to a terminal (DTE) with a 25-pin connector. Alternatively,
you can use a modem cable and a null-modem adapter. DTR (pin 20) and RTS (pin
4) must be on, or high, on your terminal or in your terminal emulation program.
Pin Signal Name
Shell CHS GND
3 TXD
2 RXD
7 RTS
8 CTS
6 DSR
5 SIG GND
1 DCD
4 DTR
9 RI
Table 17. Pin-out of the Management Port