Glossary
coaxial cable | A type of wire consisting of a center wire surrounded by insulation and a grounded shield of |
(coax) | braided wire. The shield minimizes electrical and radio frequency interference. |
DOCSIS | The CableLabs |
| for VoIP cable modems and supporting equipment. |
download | To copy a file from one computer to another. You can use the Internet to download files from a |
| server to your home PC. A DOCSIS VoIP cable modem downloads its configuration from a |
| server during |
downstream | In a network, downstream describes the direction of data received by your computer from the |
| Internet. |
Ethernet | The most widely used type of local area network (LAN). The most commonly installed Ethernet |
| networks are called |
| second (Mbps), usually over |
| transmission speeds up to 100 Mbps. |
expansion slot An opening in a computer where a circuit board can be inserted to add new capabilities.
IP address An Internet Protocol address is an identifier for a computer or device on a TCP/IP network. Networks using the TCP/IP protocol route messages based on the destination IP address. Your cable service provider assigns your VoIP cable modem an IP address to provide a continuous Internet connection.
MAC address | The Media Access Control Address uniquely identifies each device that can be connected to |
| an Ethernet network. It is permanently written to |
| printed on the rear panel of your SURFboard VoIP cable modem. You need to provide the MAC |
| address to your cable service provider. |
MHz | Mega Hertz. A measure of radio frequency - millions of cycles per second. One MHz means |
| one million cycles per second. |
PSTN | The public switched telephone network is the traditional |
| telephone network originally invented by Alexander Graham Bell. It is sometimes referred to as |
| plain old telephone service (POTS). |
The most common type of connector for household phones. | |
The most common type of connector for Ethernet networks. | |
splitter | A splitter is a device that divides the signal power from an input cable equally between two or |
| more signals, each carrying a selected frequency range. |
TCP/IP | Transmission Control Protocol/Internet Protocol is a set of protocols that provides standards |
| and rules for communication between networks. |
upstream | In a network, upstream describes the direction of data sent from your computer to the Internet. |
UPS | An uninterruptible power source is a power supply designed to protect |
| networks against power outages, brownouts, surges, and spikes. |
USB
VoIP
Home |
Universal Serial Bus is a computer interface for
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.
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