dial-in

From the verb phrase dial in.

dial-in (not comparable)

1. 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.

2. (networking) Of a computer, set up to accept incoming modem calls.
3. (networking, proscribed) Dial-up.

• When used as an adjective, hyphenated; when used as a verb, unhyphenated (dial in).
• Use as a synonym for dial-up is proscribed, as dial-up consists of outgoing calls (a network client), not incoming calls (a network server).

dial-in (plural dial-ins)

1. The act of connecting to a system or service by means of a telecommunication network.
   • 2006, Toby Velte; Anthony Velte, Cisco: A Beginner's Guide, Fourth Edition, page 48:

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

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

• dial in

• Modem-HOWTO: Dial-in

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