DFN Modem Installation - Green card

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These instructions are for DFN camera systems equipped with green PCB modem adaptor board (see images below). For DFNEXT observatories with blue PCB modem adaptor board please refer to DFNEXT Modem Installation.


The DFNEXT / DFNSMALL observatories usually ship without modems as many of them are deployed with WiFi or Ethernet connectivity and different areas of the world require different modems.

If you wish to network your DFNEXT observatory via mobile broadband instead of WiFi or Ethernet you need to source a modem and request a modem installation care package from DFN Camera Help. You will also need to organize a 2FF ("standard") sized SIM with an active data plan.

The recommended modems are the Sierra Wireless AirPrime MC Series. MC7455 (for the Americas, Europe, the Middle East and Africa) and the MC7430 (for Asia Pacific including Australia). For Australia, MC8705 is suitable as well. It is also a good idea to verify that the selected modem will support the frequencies/bands used by your operator in the area.

Installation Steps

Before modem installation make sure the camera is powered off. If the PCB modem adaptor board is already in the camera (assuming without the modem module), remove the min USB power connector and pull the board out.

Install the modem module into the adaptor board (converter card) and fix it using M2.5 bolt and nuts.

Green converter card and Sierra MC8705 modem module next to it.jpg

A pair of bolts goes from bottom of the adopter board, fasten the first (bottom) nut or insert spacer on each of them, insert the modem module and fasten the upper nuts.

Green converter card with Sierra MC8705 modem module in slot.jpg

Next step is to insert the SIM card. First open the slot door and slide the SIM card into it.

Green converter card SIM slot open.jpg

Then shut the slot door with SIM card and lock it - see arrows on the slot door.

Green converter card with SIM card in slot.jpg

Attach the GSM antenna RF patch cable (pigtail) to the main antenna port on the modem (marked by red arrow) using your fingers or some needle-nose pliers. Ensure the U.FL connector is seated correctly.

Slide the whole modem assembly back to the slot in the DFNEXT observatory box.

Attach the mini USB cable connecting the modem with embedded PC.

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