Carrier Access Network Device Axxius 800, Руководство пользователя

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Axxius 800 - Release 2.2 Glossary - 7
Glossary
DHCP
DHCP
Dynamic Host Configuration Protocol. DHCP is a network configuration
that allows maintenance to be performed from a central site rather than
by end users.
download
To transfer data from a larger "host" system to a smaller "client" system’s
hard drive or other local storage device.
Drop & Insert
(D&I)
As applied to T1, D&I refers to the process whereby one DS0 channel is
demultiplexed out of the DS1 synchronous bit stream at one port of a
digital channel back and another DS0 inserted back in.
DS0
Digital Signal Zero, the standard bandwidth for digitized voice channels.
DS1
Digital Signal Level 1. A digital signal transmitted at a nominal rate of
1.544 Mbps.
DS3
Digital Signal Level 3. A digital signal transmitted at a nominal rate of
44.736 Mbps.
DSU/CSU
Data Service Unit/Channel Service Unit. A device terminating a digital
channel on a customer’s premises where it performs line coding, line
conditioning and equalization functions while responding to the receipt
of loopback codes sent from the Central Office (CO) A DSU/CSU sits
between the digital line coming in from the CO and devices such as
channel banks or data communications devices.
Dual Tone
Multi-
Frequency
(DTMF)
Dual Tone Multi-Frequency is the system used by touch-tone telephones.
DTMF assigns a specific sound frequency, or tone, to each key so that it
can easily be identified by a monitoring microprocessor. That frequency
is then translated into a usable analog or digital signal. This is commonly
known as Touch Tone.
Dynamic Host
Configuration
Protocol
(DHCP)
A network configuration that allows maintenance to be performed from
a central site rather than by end users.