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130 SBG1000 Wireless Cable Modem Gateway User Guide
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Configuration: Basic Gateway TCP/IP Wireless Print Server USB
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bandwidth The transmission capacity of a medium in terms of a range of frequencies. Greater bandwidth
indicates the ability to transmit more data over a given period of time.
Baseline
Privacy
An optional feature that encrypts data between the CMTS and the cable modem or gateway.
Protection of service is provided by ensuring that a cable modem or gateway, uniquely identified by its
MAC address, can only obtain keys for services it is authorized to access.
baud The analog signaling rate. For complex modulation modes, the digital bit rate is encoded in multiple
bits per baud, for example, 64 QAM encodes 6 bits per baud and 16 QAM encodes 4 bits per baud.
BCP Binary Communication Protocol
BER The bit error rate is the ratio of the number of erroneous bits or characters received from some fixed
number of bits transmitted.
binary A numbering system that uses two digits, 0 and 1.
bit rate The number of bits (digital 0s and 1s) transmitted per second in a communications channel. It is
usually measured in bits per second bps.
BPKM Baseline Protocol Key Management encrypts data flows between a cable modem or gateway and the
CMTS. The encryption occurs after the cable modem or gateway registers to ensure data privacy
across the RF network.
bps bits per second
bridge An OSI layer 2 networking device that connects two LANs using similar protocols. It filters frames
based on the MAC address to reduce the amount of traffic. A bridge can be placed between two
groups of hosts that communicate a lot together, but not so much with the hosts in the other group.
The bridge examines the destination of each packet to determine whether to transmit it to the other
side. See also switch.
broadband High bandwidth network technology that multiplexes multiple, independent carriers to carry voice,
video, data, and other interactive services over a single cable. A communications medium that can
transmit a relatively large amount of data in a given time period. A frequently used synonym for cable
TV that can describe any technology capable of delivering multiple channels and services.
broadcast Simultaneous transmission to multiple network devices; a protocol mechanism supporting group and
universal addressing. See also multicast and unicast.