US Robotics 56K USB MODEM - Betriebsanleitung PDF herunterladen (Seite 116)

GLOSSARY

112

bits per second (bps)

The bits (binary digits) per second rate.

Thousands of bits per second are expressed as

kilobits per second (kbps).

buffer

A temporary memory area used as storage

during input and output operations. An

example is the modem's command buffer.

byte

A group of binary digits stored and operated

upon as a unit. Most often the term refers to 8-

bit units or characters. One kilobyte (KB) is

equal to 1,024 bytes or characters; 640 KB is

equal to 655,360 bytes or characters.

carrier

The basic signal altered or modulated by the

modem in order to carry information.

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/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.

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US Robotics 56K USB MODEM - Betriebsanleitung Seite 116