ENUM

The bridge between the switched telephony network and the Internet


 Media Gateways
Devices which bridge conventional telephone networks and equipment to VoIP telephone networks.


 FXS-FXO Converters

Use this to create a VOIP to PSTN gateway and only have an ATA with an FXS port

 

 Connect VoIP GSM gateway to Asterisk PBX

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Voice over Internet Protocol. A technology for transmitting ordinary telephone calls over the Internet using packetlinked routes. Also called IP telephony


There are two major reasons to use VOIP
- Lower Cost

- Increased functionality

 

A way is required to turn analog phone signals into digital signals that can be sent over the Internet.


This function can either be included into the phone itself or in a separate box like an ATA .

FXS-FXO Converters

If you want to create a VOIP to PSTN gateway and only have an
ATA with an FXS port, you can use an FXS-FXO converter connect the FXS port to a PSTN phone line.

     Internet------ATA-----FXS-FX0 converter------PSTN phone line

This has been a popular option for creating a low cost PSTN gateway because of the lack of low cost ATA s with a FXO port. This option will probably continue to be popular even with the advent of the Sipura 3000 given the increasing numbers of VoIP service providers who provide users with their own nominated preconfigured brand of FXS gateway or ATA .

Sources of FXS-FXO converters


If you are using an FXS-FXO converter with a Sipura ATA then see this
mailing list posting .