User's Manual

BPS - Bits Per Second; the number of bits that can be transmitted in one second.
Carrier Signal - The analog data signal that a modem sends over telephphone wires.
COMx - Where (x = 1, 2, 3, or 4), COMx is the name(address) of serial communications ports on personal
computers. Each serial port in a personal computer has a different number.
CTS - Clear To Send.
Default - The assumed value that is used for a command parameter when no other value is explicitly
provided.
DCD - Data Carrier Detect.
DCE - Data Communication Equipment.
DTE - Data Terminal Equipment.
DTMF - Dual Tone Multifrequency(for touchtone dialing).
DTR - Data Terminal Ready.
FSK - Frequency Shift Keying.
Make/Break Ratio - The ratio of the off-hook (make) to on-hook (break) interval is the make/break ratio
in pulse dialing.
Modem - A combination of the words MOdulator and DEModulator. Modems transform digital data into
analog signals and back again.
Nonvolatile Memory - An area of memory inside the modem where the default configuration profile is
stored. Values recorded in this memory will not be lost when the power is turned off.
Off-Hook - The condition when the modem has picked up the telephone line.
Off-Line Command State - A modem state in which the modem accepts, interprets and executes
commands from an asynchronous computer or terminal.
On-Hook - The condition when the modem has not picked up the telephone line; the telephone is hung up.
On-Line - A carrier signal link with a remote modem has been established; communication is in progress.
On-Line State - A modem state in which the modem is connected with a remote modem. Data can be sent
or received from the remote modem in this state. No commands will be accepted from the modem except
the escape command which will bring the modem into the on-line command state.
On-Line Command State - A modem state in which the modem can accept or execute commands from
an asynchronous computer or terminal while remaining connected with the remote modem. The user can
return the modem to the on-line state by issuing the AT0n command or put it into the off-line command
state by issuing command such as ATZ or ATH.
Parity - An error-checking method by which the modem verifies that the data just sent is correct.
pps - Pulse per second.