Asterisk is a huge plus is that it is OpenSource-project. Ie Asterisk is not just free - it can be modified under any needs. Through an open license, Asterisk actively developed and supported by thousands of people from all over the world.
Generally speaking, IP PBX based on Asterisk can completely replace the usual MiniATS. To do this you need two types of ports: external (FXO) and internal (FXS). These ports can be found in the server specific PCI-card, which usually have several RJ-11. The fact that the main sponsor of the project is owned by Digium, which just makes such payment telephony, as well as other devices, and successfully sells them worldwide Solutions for ISP's.
Presence on the board FXO port allows you to connect to the city analog telephone line. In turn, the FXS ports are designed for simple connection of analog phones or faxes to the server. But if all subscriber devices are SIP-phones, the FXS card is no longer needed.
вівторок, 15 грудня 2009 р.
Asterisk
With the development of IP-telephony systems, it became possible to implement nearly all of the logic PBX (PBX) programmatically.
Imagine that you have three simple SIP-phone, and is to make possible communication between the three subscribers. Of course, you can prescribe in each phone IP-address of the other two, comparing them to short code dialing (most SIP-devices allows). But the very first inconvenience will come out when there will be 4-th SIP-phone - you have to reconfigure all existing phones.
SMS Solutions Now suppose that you have a server that is connected independently of each SIP-phones. And the whole logic of calls handled it: SIP-phone only sends him dialed number and establishes two-way voice connection. It turns out a kind of IP-analog ordinary PBX Iphone VoIP. Now imagine that the server can communicate with other similar servers, supports PCI-board analog and digital telephony (to combine with traditional telephone networks), integrated with the database and various external processors, and supports interactive menus, voicemail, all calls and many other extensions of functionality, such as speech synthesis and recognition, reception and transmission of faxes. So this is Asterisk.
Imagine that you have three simple SIP-phone, and is to make possible communication between the three subscribers. Of course, you can prescribe in each phone IP-address of the other two, comparing them to short code dialing (most SIP-devices allows). But the very first inconvenience will come out when there will be 4-th SIP-phone - you have to reconfigure all existing phones.
SMS Solutions Now suppose that you have a server that is connected independently of each SIP-phones. And the whole logic of calls handled it: SIP-phone only sends him dialed number and establishes two-way voice connection. It turns out a kind of IP-analog ordinary PBX Iphone VoIP. Now imagine that the server can communicate with other similar servers, supports PCI-board analog and digital telephony (to combine with traditional telephone networks), integrated with the database and various external processors, and supports interactive menus, voicemail, all calls and many other extensions of functionality, such as speech synthesis and recognition, reception and transmission of faxes. So this is Asterisk.
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