Topcom 4872 manual Technical dataTechnical characteristics, Gfsk

		Technical dataTechnical characteristics
Symptom	Possible cause	Solution
No audio for PC calls in the	The audio device for Speech is	Go to ‘Control panel’ and	English
DECT phone	not set correct in Windows to	select ‘Audio and sound
	‘USB audio device’	devices’. Select ‘Speech’ and
		make sure both playback and
		voice recording are set to
		‘USB audio device’.
	The Skype application doesn’t	Open Skype and select
	use the telephone as audio	‘Tools’. Select ‘Options’. At
	device	the ‘Privacy’ settings, select
		‘manage other programs
		access Skype’ and make sure
		only the Butler is shown in the
		list.
	The Skype audio devices are not	Open Skype and select
	set to the USB phone	‘Tools’. Select ‘Options’. At
		the ‘Sound devices’ settings,
		make sure all are set to the
		‘USB audio device’.
No PC sound anymore when	The audio device for Audio is	Go to ‘Control panel’ and
using other applications	not set correct in Windows to	select ‘Audio and sound
	your PC audio card	devices’. Select ‘Audio’ and
		make sure both playback and
		recording are set to your PC
		audio card.

14 Technical dataTechnical characteristics

Standard	DECT(Digital Enhanced Cordless Telecommunications)
	GAP (Generic Access Profile)
Frequency range	1880 MHz to 1900 MHz
Number of channels	120 duplex channels
Modulation	GFSK
Speech coding	32 kbit/s
Emission power	10 mW ( average power per channel )
Range	300m in open space /50m maximum inhouse
Number of handsets	Up to 4
Base powersupply	230V / 50 Hz / 6V DC 300mA
Handset Batteries:	2 rechargeable batteries AAA, NiMh 1,2V
Handset autonomy	100 hours in standby
Handset talk time	10 hours
Normal conditions of use	+5 °C to +45 °C
Dialling mode	Pulse / Tone
Flash time	100 or 250 ms

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