Robustel GoRugged M1000 Pro User Guide
RT_M1000 Pro_UG_v01.01
27.12.2011
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Confidential
subnetwork. To ensure that this is the case, use the same cellular ISP to connect the devices to the network. In
addition, you will need to request that the cellular ISP provide you with two private fixed IP addresses (e.g.,
192.168.1.1 and 192.168.1.2).
4.3.3
UDP Mode
The main difference between the TCP and UDP protocols is that TCP guarantees delivery of data by requiring the
recipient to send an acknowledgement to the sender. UDP does not require this type of verification, making it
possible to offer faster delivery. UDP also allows you to unicast data to one IP, or multicast the data to a group of IP
addresses.
These traits make UDP mode especially well suited for message display applications.
If your cellular ISP offers a fixed public IP address after you connect to the cellular network, you can access the
M1000 Pro from a host PC that has a fixed public IP bidirectional.
If M1000 Pro has no fixed public IP, then it can unicast data to one host unidirectional.
Note
: M1000 Pro supports unicast only.
4.3.4
Virtual COM Mode
One of the major conveniences of using Virtual COM mode is that it allows you to use Virtual COM software that was
written for pure serial communication applications. The Virtual COM driver intercepts data sent to the host’s COM
port, packs it into a TCP/IP packet, and then redirects it through the host’s Ethernet to the Internet. At the other end
of the connection, the M1000 Pro accepts the IP frame from the cellular network, unpacks the TCP/IP packet, and
then transparently sends the data through the serial port to the attached serial device.
We provide application notes to introduce how to work with 3
rd
parties’ popular virtual com software, please contact
us to get more information.
Note
:
Virtual COM software (COM port redirector) is a specialized software (often including device driver and user
application) that includes the underlying network software necessary to access networked device servers that provide
