Cabletron Systems STS16-20D User Manual

Cable and Pin Information

SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide

This appendix provides information on cables that can be used with the SmartStack 
STS16-20D/STS16-20R. It also provides minimum pin-out information to be used 
to verify that the cables are correctly wired.

Table 16 lists the type of cables that are used when connecting to the OBM port 
(labeled MANAGEMENT) on the front panel of the switch. 

The switch’s Out-of-Band Management (OBM) port (labeled MANAGEMENT on 
the front panel) is an TIA/EIA-232 port wired as a DTE. For this reason, you cannot 
use a straight-through modem cable to directly connect a terminal to the 
MANAGEMENT port.

For a terminal connection, you can use either a null-modem cable or a modem cable 
with a null-modem adapter attached. For a modem connection, you can use a 
standard modem cable.

This section provides pin-out information for the cables you can use to connect to 
the MANAGEMENT port.

Connect a modem to the 
MANAGEMENT port.

Connect one end of a straight-through, 
TIA/EIA- 232 modem cable to the 
MANAGEMENT port and the other end to the 
modem.

Connect a PC or other DTE 
device to the 
MANAGEMENT port.

Connect one end of a crossover, TIA/EIA-232 
cable to the MANAGEMENT port and the other 
end to the PC or DTE device
or
attach a null-modem adapter to the 
MANAGEMENT port. Then, attach a straight-
through modem cable to the null-modem 
adapter.