User`s manual
Table Of Contents
- 1. Introduction
- 2. Getting Started
- 3. Initial IP Address Configuration
- 4. Introducing Serial Port Operation Modes
- 5. Introducing OnCell Central and Ethernet Operation Modes
- 6. Using the Web Console
- 7. Cellular Network Settings
- 8. Configuring Serial Port Operation Modes
- 9. Configuring the Cellular-Enabling Ethernet Device
- 10. Configuring OnCell Central Management Software
- 11. Additional Serial Port Settings
- 12. System Management Settings
- 13. Software Installation/Configuration
- A. Pinouts and Cable Wiring
- B. RFC2217
- C. Dynamic Domain Name Server
- D. Well Known Port Numbers
- E. Auto IP Report Protocol
- F. GSM Alphabet
- G. Default Settings

OnCell G3111/G3151/G3211/G3251 Series User’s Manual Serial Port Operation Modes
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OnCell Central Management Software
In the cellular world, most service providers only offer private IP addresses to mobile devices due to
the limited availability of public addresses. Mobile devices configured with a private IP address can
access resources on the Internet, but the mobile devices cannot be managed or accessed directly
from the Internet since the private IP address is hidden. The mechanism we developed uses an
OnCell server configured with a public IP address to solve this private IP problem. The OnCell
server accepts connections from both Ethernet and serial mobile devices and remote hosts. Once a
connection is established, the mobile device and remote host can communicate with each other over
the pre-established connection. This software can be installed by a customer or hosted by Moxa (for
demonstration or testing purposes only) and can be accessed from anywhere across an IP network,
including the Internet.
To illustrate, the following network configuration example shows several OnCell devices, labeled as
“OnCell G3100.” These OnCell devices are all connected to the OnCell Central Server. The host
device is located in the same control center as the OnCell Central Server. Please refer to Chapter 11
to configure the OnCell Central Management Software.
OnCell Central Serial Device Connection
If your device uses the serial interface, and your cellular service provider assigns you a private IP
address after you connect to the cellular network, Real COM, RFC2217, or TCP Server mode allows
you to access the OnCell G3100 via an OnCell Central Server from the host PC.