Pressing Distance Communication Costs with 'IP Phone'

Unlike our country, the cost of communication in Japan at this time of year to year is low. If in the era of the 90s, the cost per 3 minute local call is 10 yen, so this time for long-distance call costs only 7.5 yen per 3 minutes. International call charges were demkian. Until 2001 to call from Japan to Indonesia for approximately 7 minutes will cost about 1000 yen. But now with 1000 yen in Japan we can do conversation - Indonesia for 120 minutes.Many factors that cause communication costs in Japan were increasingly cheap. In particular the role of government itself that orders the company owned telecommunications giant NTT to not monopolize the copper line has. This command is issued after Japan suffered bottlenecks in the development of broadband technology, ADSL (Asymmetric Digital Subscriber Line) until 2001. Japanese broadband technology was lagging far behind by its neighboring countries, South Korea. In 2001 the number of ADSL users in the country's ginseng has reached 1.5 million users. While in Japan only 8000 users only. This is because NTT does not provide the opportunity for providers to menggunakancooper pengada ADSL line it to retain business with ISDN internet connection at that time. With the opening of this facility NTT copper line, popping up like mushrooms growing ISPs that provide ADSL broadband internet connection services with a very cheap price with a minimum speed of 1.5Mbps (current ADSL connections has reached maximum speed, ie 50Mbps).The rapid development of ADSL technology makes the effects of IT development in Japan is so very fast. A variety of network-based services ADSL broadband is emerging. In particular VoIP service (Voice over IP), which eventually gave birth to IP phone technology, an internet protocol-based communications services. Similar to the previous ADSL development, development of IP phones is also not as smoothly as expected. Because the challenges posed by NTT. Obviously with the implementation of IP-based communications services will be pressing the NTT during this business. Finally at around March 2003 IP phone becomes the official voice communications services in Japan by giving a special number on the IP number with the prefix 050 phonepelanggan. Broadband is a giant Yahoo Broad Band (Yahoo BB) and the first to apply the Fusion IP phone in Japan in 2002. By using Yahoo BB service, the cost of local and long distance communication became plate rate of 7.5 yen / 3 minutes.Unlike voice communications during this that using copper line (phone line usually), IP Phone uses the internet as a medium for communication. Voice communications from one location to another which uses copper linememelukan negotiation between the operators of origin, operator interface and ending at the destination operator. The farther the distance of communication is done, then more and more operators are related to each other. This is what causes the communication cost becomes expensive. When the operator is used slightly (local communication) then the cost is cheap. Conversely, if the operators used a lot (long distance and international communication) then the cost will be higher. On the one hand the other, a voice communication with IP phonesama completely independent by earlier operators. Because the media used is the Internet network. As long as we are connected to the internet then we can easily communicate without having to worry about the cost burden of communication that we do.In the IP Phone, there are two terms of communication, namely Internet Phone danIP Phone itself. When the data in the form of a voice in packets sent over the public Internet network called Internet Phone. When the voice packet was sent through a special Internet network owned by your ISP (internet service provider, ed.), Then this is called the real IP Phone.It should be noted by ISPs pengada IP Phone is a matter of sound quality. Since both the Internet and IP phone Phonesama-use the same Internet network, then both are highly influenced by traffic conditions (traffic) the Internet at the time. When trafficinternet at that time was empty, then the sound that we receive will be good. But otherwise, the sound quality will falter, there is delaydan forth. The sound quality for IP Phones are allowed by the ITU (International Telecommunication Union) must have a value of MOS (Mean Opinion Score) of at least 4.0 and the time delay (delay time) not more than 100 ms.

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