User Manual

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2009 Industrial Wireless Guidebook
Cellular Networks
3
• Depending on whether the OnCell G3100 device is acting in a Client role or Server role, the user can select
Real COM mode or Reverse Real COM mode. Normally, the role of the OnCell G3100 device depends on
the IP address obtained from your cellular service provider. If your OnCell G3100 device’s SIM card is able
to obtain a public IP address, then the OnCell device can act as a Server and you can select Real COM
mode to connect the host PC (Client role).
OnCell Device’s IP Address Suitable Role Operation Mode Selection
Public address
Server role, Real COM mode,
Client role Reverse Real COM mode
Private IP address
Like 10.x.y.x or 172.xx……
Client role Reverse Real COM mode
If both the host PC (at the control center) and the OnCell G3100 device have private IP addresses, you can
use Real COM mode on the OnCell G3100 to resolve the private IP to private IP problem.
Real COM mode diagram
Reverse Real COM mode diagram