Glossary 115

Pulse dialing: A dialing method that uses pulses instead of tones to generate a telephone number. Generally associated with rotary dial phones, although some push-button phones can be used on pulse lines.

R

Reliable mode: Reliable mode is for error-free communication by

 

 

MNP or V.42.

 

Result code: This code returns to the computer the results of

 

executing a command sent from it to the internal modem in

 

characters or numeric values.

 

RJ11: A modular telephone connector used on most telephone

 

networks and direct-connect modems.

 

RTS signal: A Request to Send signal is an RS-232C standard that

 

indicates the modem is ready to receive data.

 

RS-232-C:The standard defining control, data and status signals for

 

cables allowing asynchronous communication with computers,

 

printers, and other peripheral devices.

S

serial: The handling of data bits one after the other.

serial communications: A communications technique that uses as

 

 

few as two interconnecting wires to send bits one after another.

 

serial interface: An interface between systems or system

 

components in which information is transmitted sequentially, one

 

bit at a time. The transmitted bits are reassembled at the receiving

 

component. A modem uses a serial interface.

 

serial port: A communications port (COM1 or COM2) to which

 

you can connect a serial device, such as a modem, a mouse or a

 

serial printer.

 

stop bit: In asynchronous serial communications, one or more bits

 

indicating the end of a block of characters.

 

S-Register: The S-Register stores the parameters for various

 

commands and modem operations.