Zyxel Omni 56K COM Plus vs Zyxel Omni 56K USB Plus

Comparison of Omni 56K COM Plus, Omni 56K USB Plus

10 specifications	A Zyxel Omni 56K COM PlusView product	B Zyxel Omni 56K USB PlusView product
Modem1 differ
Modem speed	56 Kbit/s	56 Kbit/s
InterfaceDiffers	COM	USB
Performanceidentical
Data link protocols	V.44/V.42/MNP 3-4, V.42bis/MNP 5	V.44/V.42/MNP 3-4, V.42bis/MNP 5
Upstream data rate	0.048 Mbit/s	0.048 Mbit/s
Downstream data rate	0.056 Mbit/s	0.056 Mbit/s
Maximum fax transfer rate	7.2 - 14.4 Kbps	7.2 - 14.4 Kbps
Featuresidentical
Internal	No	No
Plug and Play	Yes	Yes
Ports & interfacesidentical
I/O portsKnown for one	—Unknown — not stated by the source	USB
Power1 differ
USB poweredDiffers	No	Yes

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.