User's Manual

CHAPTER 6
SERIAL APPLICATIONS
USING THE RS-232 DATA PORT
The ESTeem 210 has a serial data port that can provide RS-232 comm
unication between two or more serial devices using the
wireless broadband link. The serial data is encapsulated and transferred as a standard Ethernet packet over an operating 210
wireless Ethernet system. The configuration for a serial 210 network will be the same as an Ethernet or a serial (RS-232) based
communication network.
The serial interface option can be used to link two or m
o
re serial devices in a new or existing system. The serial data has very little
impact on the network bandwidth and will allow for both Ethernet and serial applications simultaneously. A possible application
would be installation of the 210 in an existing serial based network that was looking for future upgrade to an Ethernet based
system. Another would be using the high-bandwidth Ethernet connections to provide a link to remote video hardware while also
providing a serial link to the existing PLC in a SCADA type application.
Revised: 5 Dec 12 6-3 EST P/N AA107-210CM
SERIAL CONNECTIONS
The 9-pin Sub-D serial data port is
located on the face of the
210 (Figure 4). Using the ESTeem AA062 interface cable, the
210 can be connected to a standard DTE-device (PC) with a
male 9-pin Sub-D connector. The complete cable
configuration is available in Appendix C – Interface Ports.
Figure 4: 210 Front Panel Overview
SERIAL CONFIGURATION
Configuration of the serial port is completed during the
standard set
up of the 210. After completion of the Repeater
Peer configuration screen, the Serial Port Setup screen (Figure
5) will be displayed. Each section in the Serial Port Setup
screen is described in detail with the following:
Enable the RS-232 Data Port
Enabling the serial data port allows the modem to send RS-232 data
over the broadband wireless connection established with the
ESTeem repeater peers. The modem can be configured in a point-to-point or point-to-multipoint system. Select Yes if you wish to
enable the serial data port.
Mode of Operation
There are two distinct modes of operation for the serial port in the 210. The Redirector mode will provide
two-way serial
communication between two or more serial devices, while the Terminal Server mode will allow serial communication to a specific
remote site by connecting through telnet or SSH. Select one of the following modes of operation:
Full Redirector Mode - This mode allows bi-directional RS-232 data
communication with other ESTeem Model 210’s. The RS-
232 data transmission will appear transparent to the connected devices as if a serial cable is connected between the two ports.
This mode will also be used in a multi-point serial network were all serial devices will need bi-directional communication (Figure
6).
Terminal Server Mode - This mode of operation translates RS-232 serial data into a network-oriented terminal protocol, such as
t
e
lnet or SSH. This mode would be selected if an interactive RS-232 session at remote locations is desired over the wireless
Ethernet link.
Baud Rate
Select the data rate of the RS-232 connection to match your serial device.