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Serial Server Properties
Four serial interface modes of operation are:
RS-232 - Point-to-point serial communications connection used by PC COM ports and
many other systems. Capable of baud rates up to 115.2 kbaud over short distances
(typically 50 feet). Typically uses DB-9 connectors but terminals are also used on
VESR9xx serial servers.
RS-422 - Point-to-point communications using a transmit pair and a receive pair. RS-
422 can operate at higher speeds and longer distances than RS-232. Typically uses
two shielded twisted pairs and screw terminals but DB-9 connectors are also used on
VESR9xx serial servers.
RS-485 2-wire - Similar speed and distance specifications as RS-422 but allows
multidrop connections. Typically uses one shielded twisted pair and screw terminals
but DB-9 connectors are also used on VESR9xx serial servers.
RS-485 4-wire - Similar speed and distance specifications as RS-422 but allows full-
duplex connections. Typically uses two shielded twisted pairs and screw terminals
but DB-9 connectors are also used on VESR9xx serial servers..
Select the appropriate serial interface mode for the type of connection between the
serial server's serial port and the device connected to it.
Note: Refer to the Appendix D for connector and pin-out details.
SERIAL SERVER NAME
Serial Server Name is a unique name assigned to the serial server. It must be a valid
hostname as defined by RFC-952 and RFC-1123. The rules are:
It must consist only of the characters "A" to "Z", "a" to "z", "0" to "9" or "-"
It can start or end with a letter or a number, but it must not start or end with a "-".
It must not consist of all numeric values.
SERVER SERIAL PORT NUMBER
The Server Serial Port Number of the currently selected port is shown in this field.
VESR901-x serial servers feature one serial port.
VESR902D-x and VESR902T-x serial servers feature two serial ports.
SERIAL WATCHDOG
Serial Watchdog controls the duration of serial inactivity when the serial port is
determined idle and causes all connections for that serial port to be forced closed.
The range is 1 through 65535 milliseconds.
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