Build 3094 Beta 2 - USB 2.0 High Speed support question

Discussion in 'Parallels Desktop for Mac' started by dburr, Dec 21, 2006.

  1. dburr


    (This was originally posted in the 3094 Beta 2 thread, but forum mods suggested that individual issue-related threads should be moved into their own thread, so here it is.)

    I noted with much glee that the latest Parallels beta now supports high speed USB 2. Finally!! Thank you for implementing this. However, I have a question.

    One of my main irritations with Parallels is the extreme slow sync speed of my PDA smartphone. (it is a T-Mobile MDA, which is actually a HTC Wizard in T-Mobile clothing. This is a Windows Mobile 5 device, and I am running ActiveSync 4.2 in Parallels.) I am hoping that the new USB 2 support will improve my sync speed; however the following note in the release notes concerns me: "NOTE! Current Build 3094 doesn’t support isochronous devices such as web cameras, microphones, etc."

    What exactly is an isochronous device, and is my PDA/smartphone considered one? (note I am syncing using RNDIS mode) If RNDIS mode is incompatible then would switching to the older serial sync protocol help?

    Thanks for the help.
  2. barnys


    Hi dburr,

    I know what you mean! I understand per "isochronous device" those that transmer data in a choppy, bursty mode, rather than in a stream. All video equipment, sound (headsets, microphones, etc), webcams, are usually choppy and bursty in their transfers, whereas a read/write from a hard drive is more constant.

    Anyway, I would be delighted with Parallels if only I could use my bluetooth/USB plantronics headseat. With this I will be able to finally use my voice over IP phone from work, without having to carry an analog headset.

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