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We are all availing the multi-faceted benefits offered to us by the unprecedented growth of technology. The late 20th century and the early 21st century have witnessed quantum betterment in the lifestyle of the society. Communication sector has kept in pace with the development of other sectors of economy. The advent of new techniques have made it less expensive to talk maintain connection with people all over the world. Among many other inventions, Direct Inward Dialing is one important one.
This is a service offered by telephone companies which enables callers to dial directly into an extension on a PBX without using an auto-attendant.
The striking feature of this system is that the telephone company allots a range of numbers all connected to their customer's PBX(Private Branch Exchange), which is a telephone exchange that serves a particular ISDN. This is a major help for the user as the PBX can route the call to the desired person or bureau within the organization. This has proved quite convenient for the users, especially if they belong to a big organization. Direct Inward Dialing, which is also known as DDI in Europe is known to have been developed by AT&T in the 1960s. Designed like the earlier similar system of IKZ service of the Deutsche Bundespos, it allows the companies to have fewer lines than extensions, still retaining a distinct number for each extension, callable from outside the company.
If you are not aware about Direct Inward Dialing, consider the fact that you are working in a big organization, where it takes a lot of time to what Direct Inward Dialing do is, it assigns a seven-digit external telephone number, with a fixed four- or five-digit prefix to each extension of the PBX system. If you are aware of the internal extension of his or her correspondent can dial the seven-digit number and be connected directly to the person called, avoiding the operator or PBX auto-attendant. Although the global communication has improved a lot on the facilities of Calling all over the world, it has also developed the internal communication system. Majority of the companies which are big in size and employee count look forward to avail this service. People working in such offices often have their work number which are actually DID number.
While DID World Wide (60 countries) and Voxbone (40 countries) are known for being the reputed international DID providers, the popular DID resellers which offer DID numbers for individuals and small enterprises include DID Exchange,
Virtualphoneline, and PimpMyNumber. The system of Direct Inward Dialing is widely used by the fax servers. Unlike the exchange at the end of the 234 000 line, a computer running fax server software and fax modem cards prefer to use the last three digits in order to identify the recipient of the fax. The advantage in this facility is that a large number of people can have their own individual fax numbers, in spite of the fact that there is only one fax machine. This facility has been of great help for the people as they can contact the desired person without any hindrance.
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