ZyXEL Communications Omni 56K USB Lite User Manual page 87

A Digital Subscriber Line Access Multiplexer (DSLAM) is a network device,
DSLAM
usually at a telephone company central office, that receives signals from
multiple customer Digital Subscriber Line connections and puts the signals on a
high-speed backbone line using multiplexing techniques. Depending on the
product, DSLAM multiplexers connect DSL lines with some combination of
asynchronous transfer mode (ATM), frame relay, or IP networks.
Digital signal processor. ZyXEL modems are equipped with this/these
DSP
device(s). DSPs generate, process and analyze all signals.
DSR Data Set Ready - a control signal line of the RS-232C standard.
DTE Originally, the DTE (data terminal equipment) meant a dumb terminal or printer,
but today it is a computer, or a bridge or router that interconnects local area
networks.
DTMF Dual Tone Multi-Frequency. The technology used in pushbutton telephones,
commonly known as touchtone, of generating audible notes to represent
numbers.
DTR Data Terminal Ready - a control signal line of the RS-232C standard interface.
Some computers set this signal when they are turned on, even if they are not
able to receive data.
Echo For a modem user, echo has two meanings: A modem can return all received
characters to its local terminal/computer so they can be seen on-screen. The
other meaning of the term "echo" is that part of the analog signal the modem
sent out is bounced back by the telephone network to the modem's receiver,
mixing there with the remote modem's signal.
EDR Extended Distinctive Ring - A feature of ZyXEL modems that helps to
distinguish between data, fax and voice calls.
EEPROM An Electronically Erasable and Programmable Read Only Memory. Such a
device is used in ZyXEL modems to store settings and profiles. An EEPROM
does not lose data when the modem is turned off.
EIA Electronic Industry Association (of North America); this organization was the
first to draft a standard serial port (RS-232C).
EMI ElectroMagnetic Interference. The interference by electromagnetic signals that
can cause reduced data integrity and increased error rates on transmission
channels.
Glossary
Omni 56K USB Lite
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