Most hand-held wireless modems today send data at average rates of roughly 19.2 kilobits per minute.

A modem, in turn, sends data over telephone lines to another computer.

These modems send information no faster than older ones.

Buy modems for each end of the data circuit, sending one to the connecting point site.

While in command mode, the modem may send responses back to the computer indicating the outcome of the command.

The most common modems in use today can send and receive 14,400 bits per second (14.4 kilobits) over standard telephone lines.

As part of connection negotiation, each modem sent line probe signals, measured the echoes, and set up its delay lines.

In normal use, a modem can send or receive data at any point in time, a mode of operation known as "asynchronous".

Once the connection was made, which occurred quickly, both modems sent a small identification string to the remote modem.

Although the modem can send faxes, it cannot receive them.