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IP Phone: Wireless

A Wireless VoIP Phone converts voice signals into IP packets using 802.11 standards for transmission over a Wi-Fi network following VoIP protocols

Block Diagram


AC Adaptor Analog Muxes (Mux) Audio CODEC - TLV320AIC3254 Application Battery Charger BlueTooth Clock DDR Power Ethernet Transceiver Fuel Gauge LCD Backlight LED Driver Level Shift (LS) Level Shift (LS) Li-Ion Battery Protection Logic Power Over Ethernet Proc Core & I/O Power RF Power Supply RF Transciever Ring/Vibrate Speaker Amp System Power Touch Screen Controller USB Interface USB Power Video DSP or VoIP WLAN MAC / Baseband Processor

Design Considerations

Wireless IP Phone converts voice signals into IP packets using 802.11 standards for transmission over a Wi-Fi network following VoIP protocols. The core cubsystems include:

  • RF Transceiver/Power Amplifier: Performs the frequency translation between RF and base band signals. The power amplifier amplifies the RF signal.
  • Media Access Control (MAC)/Base Band Processor: Implements 802.11a/b/g MAC functionality and provides complete modem functionality. The MAC implements 802.11/a/b/g protocols to control the communication (access) between the host (voice processor) and the access points (RF front end). The base-band processor performs the 802.11 modem operation.
  • DSP/Microcontroller/OMAP: The DSP executes VoIP call controls and voice processing. The microcontroller controls the handset user interface.
  • Memory: Stores executing code and data/parameters.
  • Peripheral Interface: Allows user to communicate with system network, control video/audio I/O sources, and perform voice/data communication.
  • Audio CODEC: Newer generation TI audio codecs, such as the TLV320AIC3254, process sound with better audio quality and longer battery life.
  • Power Conversion: Converts the input power from the AC adaptor or USB to run various functional blocks.

Application Notes

  • Board and System Design Considerations for the TMS320VC5503/06/07/09A DSPs (sprab14.htm, 8 KB)
    19 Nov 2008 Abstract
    

News Releases & Authored Articles

News Releases

Date Headline
21 Jul 2008 TI launches Power over Ethernet controller to optimize sub-13-W designs
03 Jun 2008 Hundreds of innovative ideas submitted in TI's Vision for Voice contest bring new VoIP technology ideas to light
18 Mar 2008 From real-time language translation to voice-enabled appliances, Texas Instruments invites public to sound off on the future of voice
12 Feb 2008 TI introduces tiny USB power management switches with adjustable current limit

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