dial-in

Of a system or service: accepting incoming connections over a telephone line.

You can access your messages via Option 3 of our dial-in service menu.

Of a radio or television program: synonym of call-in.

Of a computer, set up to accept incoming modem calls.

Dial-up.

The act of connecting to a system or service by means of a telecommunication network.

Enterprises need to connect telecommuters and remote offices; ISPs need to take dial-ins from subscribers; and so on.

A driver's estimate of the time required to reach and cross the finish line, used to determine the head start for each vehicle.