Ubee UBC1301-AA00 Advanced Wireless Voice Gateway Subscriber User Guide • March 2017 88
9Glossary
This chapter defines terms used in this guide and in the industry.
ALG (Application-Level Gateway)
A type of security device that acts on behalf of the application servers on a network,
hiding the servers themselves from traffic that might be malicious.
Broadcast
A packet sent to all devices on a network.
BSS (Basic Service Sets)
A basic service set is the fundamental building block of an 802.11 wireless local area
network. The overlapping BSS problem refers to a situation where two or more systems,
unrelated to each other are in close enough proximity to hear each other physically.
Overlapping BSS may degrade the network performance severely.
Channel Bonding
A computer networking configuration where two or more network interfaces are combined
on a host computer for redundancy or increased throughput. Data is transmitted over
these channels as if they are one channel.
CMTS (Cable Modem Termination System)
Typically located in the cable company’s headend, the CMTS is equipment that provides
high-speed data services to subscribers, such as cable Internet and Voice over IP (VoIP).
CPE (Customer Premises Equipment)
Equipment such as telephones, routers, and modems located at a user’s location to
enable access to communication services.
Default Gateway
The routing device used to forward all traffic that is not addressed to a computer on the
local subnet.
DHCP (Dynamic Host Configuration Protocol)
A protocol that centrally automates the assignment of IP addresses in a network. Using
the Internet’s set of protocols (TCP/IP), each machine that can connect to the Internet
needs a unique IP address. For example, when the service provider sets up computer
users with a connection to the Internet, an IP address is assigned to each machine.
DHCP lets the service provider distribute IP addresses and automatically sends a new IP
address when a computer is plugged in to the high-speed Internet network. DHCP uses
the concept of a “lease” or amount of time an IP address is valid for a computer. Lease
times can vary.
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