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An IP phone uses VoIP technologies allowing telephone calls to be made over an IP network such as the internet instead of the ordinary PSTN system.
It may have many features an analog phone doesn't support as being a fully digital and programmable, and often have special keys configurables .
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At the moment IP telephony, through a standard broadband access, offers you the same quality than traditional telephony.
When call runs just through internet (calling SIP to SIP), audio quality could be even better than traditional telephony with WideBand codecs (G.722).
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It's the protocol used by Adam Telefonía IP and others VoIP providers. Nowadays it's the standar for the IP communications in the Net.
Apart from voice conversations, SIP protocol establishes any multimedia communication session in real time, like video or IM.
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Both systems use Internet to transmit the voice, but their basic differences are importants:
- Skype is a proprietor protocol, so the free calls are just for Skype users. SIP is a standar and its running is described in public RFCs accessibles to everyone.
- To use Skype is necessary to switch on your computer. With Adam you can use IP phones or traditional ones connected to an adapter. You can also connect your current tradicional PBX.
- Skype select nodes and the software makes the election. So, it's possible your computer turns into a node for other users and use more bandwith and CPU.
- There is a big experts and users community working in SIP protocol, because it's an open protocol, and that permits to develop improvements and new services, and faster than with Skype.
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In the traditional telephony the connections are dedicated and take recourses from the net.
However, in the IP telephony the voice goes in IP packets, taking advantage from the Internet infrastructure and taking recourses just when it’s necessary.
This way, the costs are lower and the rates can be cheaper for the customer.
Adam Telefonía IP rates are the same regardless of the hour of the day and the calls are counted in seconds from the first second.
Besides that, there isn’t set-up call charge in any destination and calls between Adam Telefonía IP users are free.
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You just need a broadband internet access, a SIP device, (you can choose between a softphone installed in your computer, an adapter connected to your analog phone or an IP phone) and contract the services of a VoIP provider, as Adam Telefonía IP.
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