User's Manual

Table Of Contents
CHAPTER 5
ETHERNET APPLICATIONS
USING THE RS-232 DATA PORT
The ESTeem 195C/M has a serial data port that can provide RS-232 communication 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 195C/M
wireless Ethernet system. The configuration for a serial 195C/M 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 more 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 195C/M 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: 24 Jan 14 5-3 EST P/N AA107-195CM
SERIAL CONNECTIONS
The 9-pin Sub-D serial data port is located on the face of the
195C/M (Figure 4). Using the ESTeem AA062 interface
cable, the 195C/M 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.
SERIAL CONFIGURATION
Configuration of the serial port is completed during the
standard setup of the 195C/M. 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:
Figure 4: 195C/M Front Panel Overview
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 195C/M. 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 195C/M’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
telnet 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.