I am able to connect to the controller using the Windows telnet app, but when I try to connect from terminal on Mac OS X, I only get a single '?' response from the 4163 controller and the red "Error" light illuminates. In this state, Galilsuite also cannot communicate (error 93) and I must cycle power on the controller. Is there anything special I need to set in telnet to make this work?
Thanks
Here is a transcript of my connection (initial connection produces the single '?' response. I try a few commands, nothing):
50-78-176-59-static:~ david$ telnet 192.168.1.73
Trying 192.168.1.73...
Connected to 192.168.1.73.
Escape character is '^]'.
?TT
TP
^]
telnet> quit
Connection closed.
50-78-176-59-static:~ david$
dcollins on 12/30/2016 - 12:15
Need to specify port 23. I think OS X defaults to a secure connection which I guess the 41x3 doesn't support
this works: telnet <host> 23
MattK on 01/03/2017 - 11:49
Hello David,
You are correct, the DMC-41x3 supports the telnet protocol, commonly delineated by port 23. In addition, UDP connections are supported as well. SSH and other connection types are not.
Most likely what was happening was the exit characters being sent over the secure connection were being interpreted by the controller as a command to drop into the Operating System. Hence the red light and loss of communication without power cycle.