Direct Inward Dialing

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Related to Direct Inward Dialing: direct outward dialing

direct inward dialing

[də′rekt ¦in·wərd ′dīl·iŋ]
The capability for dialing individual telephone extensions in a large organization directly from outside, without going through a central switchboard.

Direct Inward Dialing

(DID) A service offered by telephone companies which allows the last 3 or 4 digits of a phone number to be transmitted to the destination exchange.

For example, a company could have 10 incoming lines, all with the number 234 000. If a caller dials 234 697, the call is sent to 234 000 (the company's exchange), and the digits 697 are transmitted. The company's exchange then routes the call to extension 697. This gives the impression of 1000 direct dial lines, whereas in fact there are only 10. Obviously, only 10 at a time can be used.

This system is also used by fax servers. Instead of an exchange at the end of the 234 000 line, a computer running fax server software and fax modem cards uses the last three digits to identify the recipient of the fax. This allows 1000 people to have their own individual fax numbers, even though there is only one 'fax machine'.

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References in periodicals archive ?
Direct Inward Dialing Solution is the technically sound software which is best suited for the small scaled businesses.
The company delivers high-quality inbound communications (often referred to as direct inward dialing, or DID) from more than 50 countries and more than 4,000 cities around the world.
DIDX representatives welcome visitors at Comptel Plus Fall 2013 booth 325 to discuss current successes and issues in telecommunications and unified and cloud communications' direct inward dialing services.
With limited staff and the need for more efficient communication, small businesses can take advantage of direct communication with customers using Direct Inward Dialing on an already feature-rich phone system," said Jane Donnelly, director of sales for the enterprise business group at Advanced American Telephones.
Compared to traditional PBX and business phone number service, direct inward dialing saves the cost of a switchboard operator, calls move faster, and callers who place calls to "phone numbers" that are routed via direct inward dialing feel they are calling a person rather than just a business.
Users of PortaOne's PortaSwitch IP Call Control/Billing Subsystem Can Now Offer Their PBX Customers Direct Inward Dialing (DID) Numbers from Over 60 Countries
As a non-profit looking to reduce costs, the Society also employs TeleVantage's Direct Inward Dialing (DID) feature, which allows members to dial a staff number directly thereby bypassing an auto-attendant.
a leader in wholesale direct inward dialing (DID) and session initiation protocol (SIP) services, will offer Voiceserve's award winning mobile dialers through its massive DIDx network.
Subsequent to the move, GPT will provide direct inward dialing.
announced its latest update to the world's largest number of service providers peering to buy and/or sell direct inward dialing phone numbers, now all USA and also UK area of +44 7 DIDs are available with incoming SMS.
Direct Inward Dialing (DID) - Automatic dialing of preprogrammed digits for Centrex type services - Enhanced dialing plans to manage various services or dialing requirements - Expansion of Central Office (CO) lines from the standard nine (9) up to thirty-three (33)
Bill McGoey, Senior Vice President of American Partners Bank, said, "We assigned direct inward dialing numbers to our employees that work closely with customers, and have received the productivity advantages of receiving faxes to the desktop.

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