Operation
5.8.6.11.5 TCP Port
TCP port numbers are used to allow clients to attach to specific services that are
offered by a host with a given IP address. Conceptually, this allows the host to
offer a variety of different services over a single network connection. The TCP port
number is an integer that ranges from 0 to 65535.
NOTE: TCP port change will not go into effect until the ACU is rebooted. Both
the IP address and the TCP port number are required in order for any
network connection to be established.
The default TCP port setting of 23 was chosen to facilitate connections made with
telnet clients. These clients also default to the use of TCP port 23. A telnet client
can also be used to communicate with TCP ports other than port 23. An example
command to contact an ACU with an IP address of 10.0.0.1 and
a TCP port of 1024 is:
telnet 10.0.0.1 1024
It is important to note that a TCP port number should be chosen that can be
supported by the client application. Some telnet clients have been observed to not
communicate with the ACU when port numbers 0, 1, or 65535 have been
specified. If an alternate TCP port number is selected, be sure to test it.
5.8.6.11.6 Shell
This menu specifies the user interface, or "shell", for this port. See the Remote
Port Configuration in Section 5.8.6.12 for descriptions of the shells.
5.8.6.11.7 Echo
This option is only visible when one of the M&C shells is active. If Enabled, the
ACU echoes back all characters typed in. This is the usual setting if typing data
directly into the port using a terminal. If Disabled, the ACU does not echo
characters. This is the usual setting for a computer interface.
5.8.6.11.8 Newline
This option is only visible when one of the M&C shells is active. This controls how
the ACU terminates its output lines. If set to CR, the line is terminated only with a
carriage return. If set to CRLF, the line is terminated with carriage return line feed.
Note that this only controls the ACU's output. The input line is expected to be
terminated with CR only--LFs are not tolerated in the input.
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