VoIP (Voice Over IP) technology is set to revolutionise the telephony world.

Soon, we will make calls not via circuit-switched connections, but via VoIP which allows for far more efficient use of communications networks. Rather than making a physical connection between two calling parties, telephone voice traffic is routed across IP networks.

Network operators will have the challenge of new billing models as IP reduces the effect of distance on a telephone call, consumers will get the benefit of more choice.

Systems such as Skype demonstrate what is possible with VoIP, and the telephone operators will allow VoIP networks to integrate with normal telephone numbering systems.

Consumers with broadband will be able to connect Analogue Telephone Adapters (ATAs) to their home networks, and make and receive telephone calls using normal telephone equipment connected to these ATAs. Broadband routers with integrated ADSL and cable modems will start to appear, further integrating VoIP services into the digital home.

Note that you will not need a PC to make and receive VoIP calls - the system will work the same as a normal telephone system. How calls are charged will depend on your service provider.

Example configurations are shown here, in the first case an existing broadband setup with a modem (could be ADSL or cable for instance) and a router which accepts a number of connections. In this case one connection is used to connect to one or more PCs on a home network, and another to a VoIP ATA which in turn is connected to a telephone. Some ATAs may even provide more than one channel, so allowing multiple telephones to be added.

Next, we integrate the ATA functionality into the router.

Now, the complete modem, router and ATA...

Of course, we offer all of the devices to create these products from Conexant.

In the future, it should be possible to add features like telephone answering machine functionality into the router, possibly even a web server so you could access your telephone messages from a PC anywhere in the world!

Maybe the router could email your messages to you...

Data sheets and descriptions of our VoIP devices are below, many more will be introduced over the next few months, be sure to come back and check with us soon.

• Packaged in an 80-pin PQFP
• One voice channel
• Fully integrated device including memory
• G.711, G.723.1, G.726, G.728 and G.729a speech codes
• Asynchronous Speech Codec Support
• ARM940 @168MHz with instruction (4 kB) and data (4 kB) cache
• 16k * 32 internal ROM, 8k * 32 internal RAM
• External memory controller for access to either SDRAM or SRAM (2, 4, or 8 Mbytes)

Download data sheet
Example Voice Daughter Board and Schematic

• Packaged in a 208-pin MQFP
• Two voice channels
• Fully integrated device including memory
• G.711, G.723.1, G.726, G.728 and G.729a speech codes
• Asynchronous Speech Codec Support
• ARM940 @168MHz with instruction (4 kB) and data (4 kB) cache
• 16k * 32 internal ROM, 8k * 32 internal RAM
• External memory controller for access to either SDRAM or SRAM (2, 4, or 8 Mbytes)

Download data sheet

• Delta-sigma ADC/DAC with dynamic range >70 dB
• Line input and output for a PSTN interface
• Single-ended speaker driver
• Differential line driver
• Single-ended microphone input with internal gain and filtering
• Analogue and digital filtering in both directions
• Input/output mode selection and control
• Packaged in a 32-pin LQFP
  

The SIP VoIP Adaptor can turn your traditional telephone into an IP device. The adaptor is the key enabler that facilitates an analogue phone (handset or wireless) connection to a digital voice phone service. Set-up only takes minutes requiring no technical expertise or wiring in the walls. The SIP VoIP adaptor is capable of delivering a cost-effective solution for commercial and residential applications worldwide. Consisting of a voice coprocessor, home network processor and a voice codec, the adaptor converts your voice from an analogue signal to a digital signal which is then sent out over a high speed Internet connection. Supporting one voice port and one 10/100BaseT Ethernet port, the adaptor can make use of existing Ethernet LANs in addition to DSL or cable broadband modems. Connect a traditional telephone and a FAX machine to your computers VoIP network; or deploy a second-line service to take advantage of emerging telephony applications.

• DTMF Detection and Generation
• Echo cancellation
• Flexible configuration
• Registration
• Multiple codec support G.711 and G.729
• Authentification
• Call control features such as Call Waiting, Call Transfer, Call Forwarding, Caller ID and Call Management

Download data sheet