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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) w& E j1 d& Y! v; Z
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2.1 Interference
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2.4 Lawful interception * W- V+ E2 ~& S: ]% G0 w! i+ l+ s
2.5 Equipment location 9 H& s# x* A O8 i' y
2.6 Network integration - d3 [3 s, V& P$ p4 ]9 l5 K
2.7 Emergency calls 9 p! T: f( `/ _ b6 F& z3 u C
2.8 Quality of service ( t/ J N1 J% y1 P
2.9 Spectrum accuracy
# z+ m5 v3 v! g1 t2.10 Handover
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