Cabletron Systems STS16-20R User Manual

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

Accessing Switch Management

4. At power on (cold boot), the SmartStack STS16-20D/STS16-20R performs a 

series of self-test diagnostics verifying that hardware components are 
functioning. An example of the self-test diagnostic screen is shown later in this 
chapter.

If the diagnostic list does not appear, or is garbled, try adjusting the baud rates 
between the console and the SmartStack STS16-20D/STS16-20R by using the 
Autobaud routine within the switch. To do this, press the reset button on the front 
of the switch and wait for the internal diagnostics to finish (the DIAG LED turns 
off). The reason for the reset is that in case the switch’s Autobaud routine is 
disabled, resetting it will set it to its default mode Autobaud enabled.

Depending on the type of the console, there are several console command keys that 
will potentially initiate the Autobaud routine in the SmartStack STS16-20D/
STS16-20R. Four of these keys are 

RETURN

, the combination keys 

ALT-B

, the 

BREAK

 key, and 

ESC

.

After the DIAG LED turns off, try one of the command keys at the console, and 
press it repeatedly. If there is no response, wait several seconds and again, press it 
repeatedly. If necessary, perform the same routine using the other command keys.

If this does not work, and there is garbled output on the screen, try pushing the 
unlabeled system request button on the SmartStack STS16-20D/STS16-20R. As 
soon as garbled characters appear, press the console’s 

ENTER (

or

 RETURN)

 key 

twice in rapid succession. (Again, try the other command keys as necessary).

If the problem remains, try the following steps:

1. Check all of the cable connections.

2. Check the baud rate at the console’s set up screen; if it is not set to 9600, try this 

setting.

3. Try setting the console baud rate to different values up or down, and pressing 

RETURN

 for each selection.

4. If you are using a terminal emulation program, try exiting the program and 

restarting.

Microsoft Windows 
terminal emulation

Disable the “Use Function, Arrow, and Ctrl 
Keys for Windows” option located in the 
Terminal Preference menu