In present day most business operate with a phone system with active and reliable phone services to connect from and to customer, associates, vendors as the business needs it.
Direct inward dialing (DID) is a system provided by the local company to the business organizations through PBX (Private Branch Exchange) system. This is basically a blocks of phone numbers usually (but not necessarily) associated with blocks of land lines within the main circuit or terminal.
Direct Inward Dialing is also known as DDI that is Direct Dial-in. which is provided by local European and Oceania telecommunication companies for business companies.
Features of a DID
Direct Inward Dialing has many good features. Some of them are:
• DID is the cheapest way to get connected with the people operating a business.
• You can get reach many people through the use of a unique number
• You can assign an unique DID to a big team of users
• It gives you clear voice
• When having SIP based DID there is no limitation on coverage.
• DID also work with unified-communication. In which you get VoIP with media streaming.
Direct dialing-in works with fax
DID also works with Fax services. You can attach a fax machine or use cloud based phone services through IP PBX.
DID for global use
Direct Inward Dialing service is also for international calls. The PBX connects with a central office exchange and then this service covers all the international clients that dial through a local number. The service gives individual number for fax and work on the entire terminal in the company.
DIDs may be use with plain old fashioned land line system. This service is provided by the local telecommunication company for the business company with PBX service. This service also gives VoIP through IPPBX service. You can install fax machine with direct inward calling with individual number for every terminal. It also gives global services.

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