OnCell G3100 Series
Introducing Serial Port Operation Modes
4-8
UDP Mode
Compared to TCP communication, UDP is faster and more efficient. In UDP mode, you can unicast to one host
or multicast to multiple hosts and the serial device can receive data from one or multiple host computers. These
traits make UDP mode especially well-suited for message display applications.
Types of UDP Connection
Fixed Public IPs for both OnCell and Host PC
If your cellular service provider offers a fixed public IP address after you connect to the cellular network, you
can access the OnCell G3100 from a host PC that has a fixed public IP.
Domain name with DDNS
If your cellular service provider assigns a public IP address after you connect to the cellular network, you can
also access the OnCell G3100 using the domain name. If your service provider assigns a public IP address
(either fixed or dynamic) to your cellular device and your control center is the side that initiates the connection,
you can enable the DDNS function and UDP mode to allow other devices on the Internet to connect to your
device using its domain name. This will ensure that your device will remain reachable even when its public IP
address is updated. Note that you will need to register your device with a DDNS server. Please refer to
Appendix C for more information.
