JBM electronic C-130 - Manual (Page 15)

Page -15-
Copyright
©2007 JBM Electronics, Inc.
Minimal Reception
On occasion, you can find yourself in a situation where you have just enough signal to be
able to communicate with the cellular tower, and obtain an IP address, but not enough
reception to be able to sustain a viable connection.
If your cellular card is using dynamically assigned IP addresses, you can determine if you
are in a situation like this by watching the “Current Interface Address” and “Current Peer
Address” fields in the screen below:
If you refresh this screen every few minutes and notice that the “Current Interface
Address” is changing frequently, it is very possible that your device is connecting to the
network and obtaining and IP address, and then the connection to the cellular network is
being dropped. When the connection is re-established the device is then issued a
different IP address.
In this situation an external antenna can boost the signal enough to provide a sustainable
cellular connection.
Authentication Issues
If you are using a GPRS/EDGE/HSDPA card, and have at least three LEDs of signal on
the front panel signal meter, your radio connection to the network may be just fine. The
problem may lie in logging onto the cellular network.
Return to the screen shown below: