ZyXEL Communications 56K manual Dsr, Dte, Dtmf, Dtr, Edr, Eeprom, Eia, Emi, Eprom, Faq

User's Guide for ZyXEL Omni 56K USB Modem

	lines with some combination of asynchronous transfer mode (ATM), frame relay, or IP
	networks.
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.
Encryption	The act of substituting numbers and characters in a file so that the file is unreadable until it
	is decrypted. Encryption is usually done using a mathematical formula that determines how
	the file is decrypted.
EPROM	Electrically Programmable Read Only Memory. A memory chip that may be programmed
	electronically, but must be exposed to ultraviolet radiation to be erased.
Error Correction	A method to compensate for errors which occurred in the transmission path. Error
	correction is done by the modems and is transparent to the DTEs. The most familiar
	correction methods are MNP5 and V.42bis.
Ethernet	A very common method of networking computers in a LAN. There are a number of
	adaptations to the IEEE 802.3 Ethernet standard, including adaptations with data rates of 10
	Mbits/sec and 100 Mbits/sec over coaxial cable, twisted-pair cable, and fiber-optic cable.
	The latest version of Ethernet, Gigabit Ethernet, has a data rate of 1 Gbit/sec.
Events	These are network activities. Some activities are direct attacks on your system, while others
	might be depending on the circumstances. Therefore, any activity, regardless of severity is
	called an event. An event may or may not be a direct attack on your system.
FAQ	(Frequently Asked Questions) – FAQs are documents that list and answer the most
	common questions on a particular subject.
Fax	Long distance copy; facsimile – transfer of graphical data between two fax units. The
	graphical data is compressed during transfer (G3).

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