User`s manual

Table Of Contents
OnCell G3111/G3151/G3211/G3251 Series User’s Manual Serial Port Operation Modes
4-9
Types of TCP Client Connection
1. TCP Client to PC’s IP address.
The OnCell G3111/G3151/G3211/G3251 will only be able to connect to a host PC if the PC is
using a public IP address.
2. TCP Client to PC’s domain name.
To connect to a host PC, the host PC must be configured with public IP address. If it is using a
dynamic public IP, then the OnCell G3111/G3151/G3211/G3251 can connect to it using the
host’s domain name. Please refer to Appendix C for more information.
3. Connecting TCP client and TCP server within the same cellular service provider.
In order to connect properly, the IP addresses of the two OnCell devices must belong to the
same subnetwork. To ensure that this is the case, use the same cellular service provider to
connect the devices to the network. In addition, you will need to request that the cellular
service provider provide you with two private IP addresses (e.g., 192.168.1.1 and
192.168.1.2).