Mediatrix 4400 – Digital Gateway
37
A
P P E N D I X
D
Glossary
10 BaseT
An Ethernet local area network that works on twisted pair wiring.
100 BaseT
A newer version of Ethernet that operates at 10 times the speed of a 10 BaseT Ethernet.
Basic Rate Interface (BRI)
An Integrated Services Digital Network configuration defined in the physical layer standard I.430 produced by
the ITU. This configuration consists of two 64 kbit/s “bearer” channels (B channels) and one 16 kbit/s “data”
channel (D channel). The B channels are used for voice or user data, and the D channel is used for any
combination of: data, control/signalling and X.25 packet networking. The two B channels can be bonded
together giving a total data rate of 128 kbit/s. BRI is the kind of ISDN interface most likely to be found in
residential service.
Domain Name Server (DNS)
Internet service that translates domain names into IP addresses. To use a domain name, a DNS service must
translate the name into the corresponding IP address. For instance, the domain name
www.example.com
might translate to 198.105.232.4.
Dual-Tone Multi-Frequency (DTMF)
In telephone systems, multi-frequency signalling in which a standard set combinations of two specific voice
band frequencies, one from a group of four low frequencies and the other from a group of four higher
frequencies, are used. Although some military telephones have 16 keys, telephones using DTMF usually have
12 keys. Each key corresponds to a different pair of frequencies. Each pair of frequencies corresponds to one
of the ten decimal digits, or to the symbol “#” or “*”, the “*” being reserved for special purposes.
Dynamic Host Configuration Protocol (DHCP)
TCP/IP protocol that enables PCs and workstations to get temporary or permanent IP addresses (out of a pool)
from centrally-administered servers.
Federal Communications Commission (FCC)
U.S. government regulatory body for radio, television, interstate telecommunications services, and
international services originating in the United States.
Gateway
A device linking two different types of networks that use different protocols (for example, between the packet
network and the Public Switched Telephone Network).
Integrated Services Digital Network (ISDN)
A set of digital transmission protocols defined by the international standards body for telecommunications, the
ITU-T (formerly called the CCITT). These protocols are accepted as standards by virtually every
telecommunications carrier all over the world.
ISDN complements the traditional telephone system so that a single pair of telephone wires is capable of
carrying voice and data simultaneously. It is a fully digital network where all devices and applications present
themselves in a digital form.
Summary of Contents for Mediatrix 4401
Page 6: ...Contents vi Mediatrix 4400 Digital Gateway ...
Page 22: ...Chapter 2 Installation Hardware Installation 12 Mediatrix 4400 Digital Gateway ...
Page 40: ...Appendix B Cabling Considerations RJ 45 Cable 30 Mediatrix 4400 Digital Gateway ...
Page 46: ...Appendix C Standard Hardware Information Warranty 36 Mediatrix 4400 Digital Gateway ...
Page 50: ...Appendix D Glossary Wide Area Network WAN 40 Mediatrix 4400 Digital Gateway ...
Page 52: ...Appendix E List of Acronyms 42 Mediatrix 4400 Digital Gateway ...
