[mdlug] Serial port use to connect to a network switch - Ubuntu 14.04

[gib at juno.com]

I attempting to connect a laptop which has a serial port /dev/ttyS0 to a HP 5820-24XG-SFP  switch.   I can't get a connection.  Tried many options. 

An application, cutecom, looks like it would do the job but it won't respond.  

I'm able to do the following command and not get an error: sudo ls > /dev/ttS0.  

The command:  "dmesg  | grep tty" shows the port is active. 

This is using a older laptop that I bought from Tony.  It's a Dell D830.  

I'm running Ubuntu 14.04.  

I'm using a console cable (9 pin to RJ45). 

I've been trying to use putty since I'm told that will work. Won't respond.
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