11
CHAPTER
3
Connection Methods, Attributes
and Configurable Features
This chapter describes:
• Connection methods, which are configured for each of the four serial ports
• Attributes, which are configured for each of the four serial ports
• Configurable features, which are enabled/disabled for the entire serial hub
Serial Port Connection Methods
There are several methods to access a serial port on the ESP-4 MI hub.
• Serial port redirection - see page 12
• Telnet server - see page 12
• Raw TCP server - see page 13
• Raw TCP client - see page 14
• Modem emulation - see page 16
• Configuration utility - see page 22
Each connection method may be enabled or disabled for each ESP-4 MI port. A port may have
multiple connection methods enabled, with the following exceptions.
• The raw TCP client connection method is exclusive; when it is enabled on a port, no other con-
nection methods can be enabled for that port. (Conversely, if other connection methods are
enabled for a port, you cannot enable the raw TCP client connection method on that port until
you disable the other methods.)
• If you enable the raw TCP server connection method and enable the idle TCP buffering option
on a port, then the TCP server connection method becomes exclusive; no other connection
methods can be enabled for that port.
• The modem emulation connection method is valid only on an RS-232 port. This method is
exclusive; when it is enabled on a port, no other connection methods can be enabled for
that port.
In any case, a port may be actively open and used by only one method at a time.
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