ZyXEL Communications 56K manual Rts/Cts

User's Guide for ZyXEL Omni 56K USB Modem

RTS/CTS	See CTS/RTS.
RXD	Line for the received data on a serial port following RS-232C.
Server	A computer, or a software package, that provides a specific kind of service to client
	software running on other computers.
Security Function	Features of the ZyXEL modems that help deny illegitimate contacts to your computer
	system through telephone lines.
Self-test	Ability of the modem to check its components and operations for faults.
Serial Port	Communication path through which data is transferred bitwise. Only one wire each is
	available for transmitted and received data.
Shareware	A distribution method for software. The author lets the user try out the fully functional
	software for a certain amount of time at no charge. If the customer wants to keep and use
	the product after the period, he must pay the requested fees. This method depends heavily
	on the honesty of the user.
Shoulder Surfing	Looking over someone's shoulder to see the numbers they dial on a phone, or the
	information they enter into a computer.
Signal to Noise	A measure for the signal quality of a connection.
Ratio
SILENCE	Status detected in voice mode. If the modem returns a silence message, no voice energy
	was detected after a connection was established.
Slave	Any device that is controlled by another device called the master.
SPAM	Unwanted e-mail, usually in the form of advertisements.
Speech	Changing spoken sound into digital data that can be processed and saved by a computer.
Digitalization
SPID	(Service Profile Identifier): The ISDN switch needs to have a unique identification number
	for each ISDN set to which it sends calls and signals.
Spoofing	To forge something, such as an IP address. IP Spoofing is a common way for hackers to
	hide their location and identity.
SRAM	Static Random Access Memory. A memory device used to store both program and data.
S-register	Abbreviation of status-register. The currently used parameters are stored in the status
	registers. S-registers are a part of the modem's internal memory.
SREJ	Selective Reject – extension of the V.42 protocol that allows the more efficient handling of
	retransmission of erroneous data blocks.
Start Bit	In asynchronous transfers, a new character is introduced by the start bit.
Stop Bit	In asynchronous transfers, every character is terminated by one or two stop bits that show
	where a character ends.
Straight Through	A cable that wires a pin to its equivalent pin. This cable connects two dissimilar devices,
Ethernet Cable	for example, a data terminal equipment (DTE) device and a data communications
	equipment (DCE) device. A straight through Ethernet cable is the most common cable
	used.

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