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Sportster Flash x2 - User’s Guide 35

Byte

A group of binary digits stored and operated upon as a unit. A byte

may have a coded value equal to a character in the ASCII code (letters,

numbers) or have some other value meaningful to the computer. In

user documentation, the term usually refers to 8-bit units or characters.

1 kilobyte (Kbyte) is equal to 1,024 bytes or characters; 640 Kbytes

indicates 655,360 bytes or characters.

Carrier

A tone signifying a connection the modem can alter to communicate

data across telephone lines.

Character

A representation, coded in binary digits, of a letter, number, or other

symbol.

Characters Per Second (CPS)

A data transfer rate generally estimated from the bit rate and the

character length. For example, at 2400 bps,

8-bit characters with Start and Stop bits (for a total of ten bits per

character) will be transmitted at a rate of approximately 240 characters

per second (cps). Some protocols, such as error-control protocols,

employ advanced techniques such as longer transmission frames and

data compression to increase cps.

Class 1 and 2.0

International standards used between facsimile application programs

and facsimile modems for sending and receiving faxes.

Cyclic Redundancy Checking (CRC)

An error-detection technique consisting of a cyclic algorithm performed

on each block or frame of data by both sending and receiving modems.

The sending modem inserts the results of its computation in each data

block in the form of a CRC code. The receiving modem compares its

results with the received CRC code and responds with either a positive

or negative acknowledgement.

Data Communications

A type of communications in which computers are able to exchange

data over an electronic medium.

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Robotics Sportster Flash x2 Guía de usuario Pagina 39