DID - direct inward dialing
Short for direct inward dialing (also known as direct dialing inward), a service of an LEC or local phone company that allows an organization to have numerous individual phone numbers for each person or workstation in its PBXsystem that run off of a small block of dedicated telephone numbers. DID allows the multiple lines to be connected to the PBX all at once without requiring each to have a physical line connecting to the PBX.
For example, if an organization has 25 employees and each employee has a separate telephone number, or extension, within its physical location, the organization can rent 10 physical trunk lines from the telephone company that will allow 10 phone calls to take place simultaneously. Others would have to wait for an available line and anyone dialing into the system while all 10 lines are in use would get either a busy signal or be channeled into a voice mail system. A DID system does not require a PBX operator and can be used for fax and voice transmissions.
IT Solutions Builder TOP IT RESOURCES TO MOVE YOUR BUSINESS FORWARD
Which topic are you interested in?
What is your company size?
What is your job title?
What is your job function?
Searching our resource database to find your matches...
Stay up to date on the latest developments in Internet terminology with a free newsletter from Webopedia. Join to subscribe now.
From A3 to ZZZ this guide lists 1,500 text message and online chat abbreviations to help you translate and understand today's texting lingo. Read More »List of Well-Known TCP Port Numbers
Port numbers 0 to 1024 are reserved for privileged services and designated as well-known ports. This list of port numbers are specified in... Read More »
Computer architecture provides an introduction to system design basics for most computer science students. Read More »Network Fundamentals Study Guide
Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »The Five Generations of Computers
Learn about each of the five generations of computers and major technology developments that have led to the computing devices that we use... Read More »