Motorola SBV5121 用户手册

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SBV5121 VoIP Cable Modem User Guide
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USB
Universal Serial Bus is a computer interface for add-on devices such as printers, scanners, and 
VoIP cable modems. When you connect your VoIP cable modem to the USB port, Windows 98 
Second Edition and later versions automatically recognize the VoIP cable modem.
VoIP
Voice over Internet Protocol is a method to exchange voice, fax, and other information over the 
Internet. Voice and fax have traditionally been carried over traditional telephone lines using a 
dedicated circuit for each line. VoIP enables calls to travel as discrete data packets on shared 
lines.