The Concept Of DID (Direct Inward Dialing)
Since the time of analog telephony, there has been an economic and technological need to have a means serve multiple customers with limited infrastructure. The DID (Direct Inward Dialing) addresses this requirement very well. It is no surprise that even today this idea is relevant despite all the technological advancements.
The original telephony concept associated dedicated resource to each customer. This meant that every telephone number had a dedicated line from the central office to the customer premise. Thus, any organisation looking to get telephone connection for a set of its employees had to purchase equivalent number of individual lines.
With the advent of the Direct Inward Dialing concept, the need for such individual lines was eliminated. Multiple numbers could not be serviced over a single trunk connecting the enterprise PBX to the central office. In the analog telephony system, there used to be operators that would complete the connections. DID concept eliminated the need for such operators too.
This concept was an economically viable alternative for the customer as well as the service provider. For the customer, this service cost a lot less as compared to getting individual lines. For the service provider this meant that the same infrastructure could be used for multiple telephone numbers.
This concept was so effective that even after the inception of digital telephony, DIDs were in demand. Instead of analog trunks, the numbers were now serviced over ISDN links between the PBX and the central office. In fact, till date many enterprise customers subscribe to PRI services to get DID numbers.
The latest innovation in voice telephony is the VoIP. Even here this concept is relevant and is implemented over the trunk between the central office switch and the communication gateway. The dedicated numbers to the gateway are assigned to individual VoIP phones within the organisation.
The Advantages of Metro Ethernet
One of the most unique things about the Metro Ethernet system is that you can get all the features at a very less price. It is economical and affordable and thus with a very low investment you can get a huge amount of return
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Finding a GigE Provider is Currently Difficult
First off before we get started, some people may not even know what GigE is. To make it simple it is probably the fastest speed anyone is going to experience on the Internet. For a long time GigE has just been an enterprise for only those who worked with the most sophisticated of systems.
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