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	ISDN(Integrated Services Digital Network) 
	RNIS-BE : Interfaces 
	 
	Base Access = 2B + 1D 
	Primary Accès = 23B + 1D (US), 30B + 1D 
	B = 64kbps MIC voices or datas 
	D = 16 ou 64kbps outside band signal 
	 
	ISDN has a transfear rate of either :  
	64 Kbps or 8KB/s 
	128 Kbps or 16KB/s 
	 
	IDSL(ISDN Digital Subscriber Line) 
	ISDL has a transfear rate of 128Kbps or 16KB/s 
 
  
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