It is not uncommon for a family or business to spend 50% or more of their telephone call costs on fixed line to cell calls.  The FX-300 will interconnect your cell (GSM) service with either your home or office PSTN (analog) line, office PBX, or your VOIP device and enable you to save on all your family or business member's cell phones expenses by taking advantage of free cell to cell calls offered by most cell service providers.

The FX-300 has a built-in cell modem (GSM tri-band) and accepts standard SIM cards from GSM service providers worldwide.   You will need to purchase an additional SIM card from your GSM service provider and install it in the FX-300.  The FX-300 then effectively becomes an additional member of your cell group or network and with most GSM service providers (Cingular, AT&T, T-Mobile, etc.) all your cell phone calls to any other cell phones in the same group/network are free.  For example Cingular to Cingular cell phone calls are all free regardless of time of day.  So in most cases the only charges you will incur by adding the FX-300 to your cell group will be the monthly charge for the new SIM card/number, which in most cases is less than $10/mo. 

How do I save on all my family or business member's cell phones expenses by using the FX-300 GSM Call Director?  

First, you will save on all your group member's (family or business) inbound cell phone expenses by making your calls from the home or office to all your family or business member's cell phones through the FX-300.  Effectively, eliminating any mobile charges for all calls from your home or office to any of your group member's cell phones.  

Secondly,  you will also save on all your group member's (family or business) outbound cell phone expenses if all chargeable outbound calls (member's cell calls to any non group member phone number) are routed through the FX-300 and terminated over your PSTN or VOIP service at a significantly lower cost. 

• To route all  your group member's (family or business) chargeable outbound cell phone calls through the FX-300 connected to your home or office PSTN line (see illustrations 2 and 3 below) they simply first call from their cell phone to the phone number assigned to the SIM chip installed in the FX-300 and they will be automatically connected to your home or office PSTN line and then be able to make their outbound calls over the PSTN line.   This process can be automated by adding the phone number assigned to the SIM chip installed in the FX-300 to all the phone numbers in your member's cell phones' phone book entries.
  

• To route all  your group member's (family or business) chargeable outbound cell phone calls through the FX-300 connected to your VOIP service (see illustration 1 below) they simply first call from their cell phone to the phone number assigned to the SIM chip installed in the FX-300 and they will be automatically connected to your VOIP service and then be able to make their outbound calls over the VOIP line.   This process can be automated by adding the phone number assigned to the SIM chip installed in the FX-300 to all the phone numbers in your member's cell phones' phone book entries. With the FX-300 your VOIP service will be available to you anywhere you have cell service saving you both time and money.

Finally, business can further benefit from deploying the FX-300 in all their branch offices and routing all calls from one office to another office through the FX-300s.  Effectively, eliminating any long distance charges for all office to office calls.  Moreover, all your business cell phone users can call any branch office for free and any branch office can call any business cell phone for free by routing these calls through the FX-300.

Here's picture showing the panel sockets: