GE MDS ORBIT MCR User Manual

268 MDS Orbit MCR/ECR Technical Manual MDS 05-6632A01, Rev. F
> show services dhcp
services dhcp leases 192.168.1.100
starts 2013-01-22T12:55:13+00:00
ends 2013-01-23T00:55:13+00:00
binding-state free
client-mac 70:f1:a1:fc:1d:da
hostname ""
Terminal Service 3.8.14
Understanding
The unit allows the setup of the COM ports as a terminal server that passes data to/from the serial port to
network interfaces. The serial port must be configured to do this, in addition to the baud rate and data
format. The data from the serial port is treated as a seamless stream; meaning it is not protocol aware and
will send data from the serial port to the remote endpoint as soon as the data is received. A terminal-
server can be selected to be
 TCP
- TCP Client
- TCP Server
- TCP Client/Server
- MODBUS-TCP server
 UDP
- Point-to-Point
- Point-to-Multipoint
- Multipoint-to-Point
- Multipoint-to-Multipoint
When a terminal server on the unit is configured as TCP server, then the unit listens on a TCP port for
client connections. When a terminal server on the unit is configured as TCP client, then the unit will
attempt to connect to the remote IP address. Once a TCP connection is established, then serial traffic from
the COM port can pass to and from the TCP port as long as the TCP connection remains established.
When a terminal server on the unit is configured as a MODBUS/TCP server, then the unit listens on a
TCP port for a client connection. Once a TCP connection is established, the unit will convert the
incoming MODBUS/TCP frame into either a MODBUS/RTU or MODBUS/ASCII frame for transmitting
on the serial port. Serial data received is converted from either MODBUS/RTU or MODBUS/ASCII to
MODBUS/TCP for transmission back to the MODBUS/TCP client.
When a terminal server on the unit is configured as a UDP endpoint, then traffic from the COM port is
sent to the remote host at the specified port in UDP packets. Likewise, traffic sent to the UDP port of the
unit is forwarded out the COM port. The UDP packets may be unicast or multicast, depending on the
UDP mode. See Table 3-20. UDP Terminal Server Settings for more information. Since UDP is stateless,
some packets may not reach their intended destination or may arrive out of order. The protocol contained
in the UDP messages must handle these scenarios.
Table 3-20. UDP Terminal Server Settings
UDP RX
UDP TX
Point-to-Point
Local Address/Port
Peer Unicast Address/Port
Point-to-Multipoint
Local Address/Port
Multicast Group Address/Port

GE MDS ORBIT MCR Specifications

General

Brand	GE
Model	MDS ORBIT MCR
Category	Network Router
Language	English