Fixed Cellular Terminal (FCT)

A fixed cellular terminal (FCT)—also known as a fixed wireless terminal, GSM gateway, or SIM box—is equipment that contains one or more subscriber identity modules (SIMs) and which can deliver calls directly onto a mobile network.  Fixed-to-mobile call traffic can be routed through an FCT and onto a mobile network over the air interface rather than through a point of interconnection (POI) between the fixed and mobile networks.  This enables a fixed-to-mobile call to appear to a mobile network operator to be a mobile-to-mobile call and thus be charged at mobile-to-mobile call rates rather than the typically more expensive fixed-to-mobile call rates.

The conventional arrangement for handling calls to mobile services is for the originating access service provider that originates the fixed-to-mobile (or mobile-to-mobile call as the case may be) to purchase a mobile terminating access service (MTAS) from the mobile network operator that will terminate the call. The originating access service provider would then route the call to the mobile network operator through a POI and the call completed by the mobile network operator.  This is depicted in Figure A.  The originating access service provider would recover the costs of purchasing the MTAS, together with the costs it incurred from originating the call, through the retail price it charged its customer for making the call.  This scenario is known as the “termination” model or the “calling party pays” model.

FCT Fixed cellular terminals (premicells) and gsm gateways have traditionally been used for saving money on calls to mobile phone networks. The FCT / GSM gateway connects to a telephone system / PBX and uses a standard mobile phone SIM card to make calls directly over the mobile phone network.  The tariffs available from mobile phone companies make calling mobile phones on all networks very cost effective.

2011-10-12
Shenzhen LETEL Technology Co., Ltd.   Novow - Design