FRITZ! ISDN-Controller C4 vs FRITZ!X USB V3.0

Comparison of ISDN-Controller C4, FRITZ!X USB V3.0

22 specifications	A FRITZ! ISDN-Controller C4View product	B FRITZ! FRITZ!X USB V3.0View product
Technical details1 differ
Cables includedKnown for one	—Unknown — not stated by the source	USB
Compatible operating systemsDiffers	Microsoft Windows 2000/NT4.0/Linux/Novell NetWare 4.x	Microsoft Windows XP, Windows Me,Windows 2000 Professional, Windows 98
Connector(s)Known for one	—Unknown — not stated by the source	1 x RJ-45, 4 x RJ-11
Short Message Service (SMS)Known for one	—Unknown — not stated by the source	Yes
Interface typeKnown for one	PCI	—Unknown — not stated by the source
Power consumption (typical)Known for one	3 W	—Unknown — not stated by the source
Supported data transfer ratesKnown for one	128 Kbit/s	—Unknown — not stated by the source
Ports & interfacesidentical
USB 2.0 ports quantityKnown for one	—Unknown — not stated by the source	1
Data link protocolsKnown for one	ISDN	—Unknown — not stated by the source
Modemidentical
Connectivity technology	Wired	Wired
Modem speedKnown for one	14.4 Kbit/s	—Unknown — not stated by the source
Transmission methodKnown for one	Full-duplex	—Unknown — not stated by the source
Supported protocolsKnown for one	ITU V.21, ITU V.22, ITU V.22bis, ITU V.29, ITU V.32, ITU V.32bis, ITU V.34, ITU V.17, ITU V.27ter, Hayes AT command set, V.110 (I.470), V.120 (I.464), X.75, ISO8208, ITU T.70NL, ITU T.90NL	—Unknown — not stated by the source
System requirements1 differ
Minimum RAMDiffers	16 MB	64 MB
Minimum processorKnown for one	StrongARM SA-110 233 MHz	—Unknown — not stated by the source
Poweridentical
AC input voltageKnown for one	—Unknown — not stated by the source	230 V
AC input frequencyKnown for one	—Unknown — not stated by the source	50 Hz
Weight & dimensionsidentical
WeightKnown for one	—Unknown — not stated by the source	1.42 kg
DepthKnown for one	—Unknown — not stated by the source	32 mm
HeightKnown for one	—Unknown — not stated by the source	137 mm
WidthKnown for one	—Unknown — not stated by the source	185 mm
Certificatesidentical
CertificationKnown for one	—Unknown — not stated by the source	CE

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.