*- Long distance prepaid services at very economic prices to be near your relatives and businesses all the time.

*- Line DA-1T is a communication service that uses the world wide web network (Internet) to trasmit telephone calls.(VoIP) That is to say, it turns your Internet connection into a VoIP line so you are able to make and receive calls from any part of the United States and Canada. Line DA-1T uses the technological platform "Voice over Internet Protocol", VoIP. Our service of VoIP guarantees a 100% digital quality and very low fares. The only requirement to obtain Line DA-1T is to have a Broadband connection (Cable, DSL, etc)

* Telephone systems for executives with direct lines to the USA . Very economic monthly fees allows them to have more profitable businesses. .

• Introduction
Telephony IP (VoIP) consists of transforming (to codify) an analogous communication or digital voice into packages TCP/IP to be transported on a data network and then being transformed (de-codified) into a remote point. Telephony IP has existed in the market for many years, but has nevertheless not been amassed because of the low bandwidth with which it operated in the past. Nowadays any ADSL conection has the necessary bandwidth to support a great amount of voice calls.

• Technologies
The technologies of VoIP have not changed essentially in the last few years except in the algorithms for compression of the voice, systems of directory (the equivalent to VoIP of a NameServer) and the protocols of service quality. All audio administration and quality, all the compression protocols among others are grouped inside a standard known as H.323.

The most basic standard of compression for audio is knowns with the designation East G.711. algorithm compresses a communication of audio to 64kbps which offers a very good quality of audio, nevertheless it requires relatively great communication channels if they are going away to support many calls. Other algorithms commonly supported by the equipment of VoIP are G.723 and G.729. These algorithms can compress the voice to 5,3 kbps which would allow to support a great amount of calls on a 128 kbps ADSL connection (ADSL is asymmetric, so should be considered its value of minimum bandwidth 128 that is normally in kbps)

Services Quality

When the communications of VoIP do not operate between power stations, it becomes necessary a server that can maintain a database of IP numbers at each point with a name or associated telephone number . Other solutions exist in the market that would allow to maintain a great amount of communications without the use of power stations. In general terms, these solutions are called "soft switches" and will be able to replace a traditional central telephone office.