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PurePath and DECT

Nir Dvash
Intellectual 660 points

Dear TI people,

It would be great if you can let me know the main upsides and downsides for chossing PurePath over DECT when coming to develop a cordless phone.

Thank you!

 

Nir.

 

  • 0
    TI__Mastermind 21125 points

    Hi Nir, 

    Do not know DECT good enough to give you a quality answer here, but lets give it a shot. 
    Assume there are different implementations of DECT out there and that some offer things outside the standard. 

    - Sound quality is roughly voice (16x16 compressed to 64 kbps) for DECT while PurePath delivers CD quality (16x48). PPW SNR and DNR will be higher. 
    - DECT has slight security built in. PPW does not do any encryption per se, but is proprietary and 'closed ' and challenging to decipher
    - Latency is in slight favor of PPW (13.33msec) vs. DECT (>20msec), at least from a spec point. Latency is typically a trade-off between link robustness and low latency
    - DECT is using a lower frequency band (1920-1930 MHz in US & Canada) that might be restricted in other countries. PPW use world-wide license free 2.4 GHz band. The lower frequency of DECT gives a small range advantage.   
    - in the US i believe the DECT output power is limited vs. what PPW can do.  

    Other factors that is hard for me to judge is ease of use, cost, link-budget / range, solution size, power consumption (average) and probably more. 

    Regards, 
    Kjetil