Testing Modemulator Connectivity; System Requirements; Set Up Cellular Connectivity - US Robotics USR3520 User Manual

Testing Modemulator Connectivity

Because Modemulators make a peer-to-peer connection to another Modemulator, it is required to
perform this set-up procedure on two Modemulators.

System requirements

 A computer with
two DB9 RS-232 serial ports
o
An Ethernet port
o
 Terminal emulation application that communicates with COM ports
 Web browser application
Or
 Two computers, each with
one DB9 RS-232 serial port
o
An Ethernet port
o
 Terminal emulation application that communicates with COM ports
 Web browser application
If the computer does not have a serial port, use a USB-to-serial cable that is compatible with the
computer's operating system.

Set Up Cellular Connectivity

1. Attach both of the included antennas to the antenna connectors on the front of the Modemulator.
2. Make sure that a cellular service plan is associated with the device (for CDMA networks) or with a
SIM card (for GSM networks).
Modemulator functionality requires a cellular service plan that has device-to-device IP routing.
This type is service is generally not available directly from Mobile Network Operators, so contact a
Mobile Virtual Network Operator (MVNO) to obtain a suitable service plan. See
details. Contact a USRobotics Sales representative for advice on finding a suitable service plan.
Preparing for GSM Networks
1. Remove power from the Modemulator.
2. Install the SIM (for GSM networks):
a. Remove the four Torx T6 screws from the top cover plate on the back of the unit and
remove the plate.
Modemulator User Guide
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Appendix K for