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In telecommunications, a femtocell—originally known as an Access Point Base Station—is a small cellular base station, typically designed for use in residential or small business environments. It connects to the service provider’s network via broadband (such as DSL or cable); current designs typically support 2 to 4 active mobile phones in a residential setting. A femtocell allows service providers to extend service coverage indoors, especially where access would otherwise be limited or unavailable. The femtocell incorporates the functionality of a typical base station but extends it to allow a simpler, self contained deployment; an example is a UMTS femtocell containing a Node B, RNC and GPRS Support Node (SGSN) with Ethernet for backhaul. Although much attention is focussed on UMTS, the concept is applicable to all standards, including GSM, CDMA2000, TD-SCDMA and WiMAX solutions
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2.1 Interference 2 ]5 Z4 q+ `. h+ r
2.2 Spectrum
2 F$ V G. Y, o5 o/ Q+ C2.3 Access control
( ?* o" U- c+ q7 A" P2.4 Lawful interception y3 f$ g" d r4 x2 s
2.5 Equipment location 5 @5 s) F8 N1 b: R% Y
2.6 Network integration ) r+ d- k% [: P
2.7 Emergency calls
3 {, Z; H. u; Y0 M2.8 Quality of service + m% I8 R; q* [
2.9 Spectrum accuracy
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