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  1. #1
    Steve
    Guest
    On SprintPCS when accessing the web with Vision on my Treo, it ties up the
    voice channel. This doesn't happen to my friends using T-Mobile and
    Cingular. Why can GSM handle both data and voice at the same time?

    Is this something SprintPCS can correct?

    If this is something that can't be corrected, I think it makes SprintPCS
    inferior to T-Mobile and Cingular. It makes my Treo only useful as one
    device where on the other carriers you can use both voice and data at the
    same time.





    See More: Vision vs. Voice




  2. #2
    Central
    Guest

    Re: Vision vs. Voice

    On Sun, 12 Jun 2005 18:09:00 -0500, Steve wrote:

    > On SprintPCS when accessing the web with Vision on my Treo, it ties up the
    > voice channel. This doesn't happen to my friends using T-Mobile and
    > Cingular. Why can GSM handle both data and voice at the same time?
    >
    > Is this something SprintPCS can correct?
    >
    > If this is something that can't be corrected, I think it makes SprintPCS
    > inferior to T-Mobile and Cingular. It makes my Treo only useful as one
    > device where on the other carriers you can use both voice and data at the
    > same time.


    No this is by design. Unlike GSM/GPRS CDMA'a 1xRTT data network was
    designed to use the same network connection as your voice just instead of
    one connection capable of doing voice it makes several for data. GSM uses
    a separate radio protocol called GPRS which was tacked onto GSM to give it
    data capabilities. Since it is separate radio link, that was added on, the
    phone has the option of using both. Where as CDMA'a data protocols use the
    same radio link so the phone can not do both at the same time.

    In theory a CDMA phone can do both with the right software to
    switch/share(think readylink) the connections it is using but I have not
    seen a consumer package from sprintpcs that does this nor do I think they
    would release it since it will only eat more tower time away from voice
    calls. With GPRS since it is a separate radio protocol the more users on
    GPRS won't take away from the tower's slots for GSM voice traffic tho it
    may take out from other areas, such as the down link from the tower.





  3. #3
    Isaiah Beard
    Guest

    Re: Vision vs. Voice

    Steve wrote:
    > On SprintPCS when accessing the web with Vision on my Treo, it ties up the
    > voice channel. This doesn't happen to my friends using T-Mobile and
    > Cingular. Why can GSM handle both data and voice at the same time?


    It's all in how the network is configured.

    > Is this something SprintPCS can correct?


    Yes. The EV-DO will pretty much take care of this problem.


    > If this is something that can't be corrected, I think it makes SprintPCS
    > inferior to T-Mobile and Cingular.


    That is entirely your opinion, which you're entitled to. Personally, it
    hasn't been a big deal for me at all.




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  4. #4
    O/Siris
    Guest

    Re: Vision vs. Voice

    In article <[email protected]>,
    [email protected] says...
    > Yes. The EV-DO will pretty much take care of this problem.
    >
    >


    Not true. DO=Data Only. It'll still require dedicated data access.
    EV-DV provides both.

    Really, it just comes down to evolutionary technologies that aren't done
    evolving yet. CDMA has more growth potential in terms of bandwidth, but
    it took some channel "space" from voice while it's evolving.

    --
    R
    O/Siris
    -+-
    A thing moderately good
    is not so good as it ought to be.
    Moderation in temper is always a virtue,
    but moderation in principle is always a vice.
    +Thomas Paine, "The Rights of Man", 1792+



  5. #5
    Isaiah Beard
    Guest

    Re: Vision vs. Voice

    O/Siris wrote:
    > In article <[email protected]>,
    > [email protected] says...
    >
    >>Yes. The EV-DO will pretty much take care of this problem.
    >>
    >>

    >
    >
    > Not true. DO=Data Only.


    You misread the reason for calling it "Evolution, data only." The idea
    behind the name is that additional channels are being added that support
    only data, not voice. This is actually very similar to how GPRS and
    EDGE work.

    When properly configured, the network will work like this: using data
    will allow you to use the voice channel's 1xRTT stream, plus up to
    several additional pilots that are data-specific stacked on top of it.
    If the network is configured right (and so far, Verizon's network is,
    not sure about Sprint), a call will go through; this will interrupt the
    base 1xRTT stream for the voice call, but leave the other pilots to
    continue the data session.

    Net result: youor data throughout will slow a bit for the duration of
    the voice call, but you should still have the functionality of both.
    EV-DV, in theory, will permit data throughput speeds to continue even as
    a voice call commences.

    Again, Verizon users have reported that this is how BroadbandAccess
    works for them. Sprint COULD decide to configure their implementation
    differently. The behavior is dependent on what the carrier decides.


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  6. #6
    O/Siris
    Guest

    Re: Vision vs. Voice

    In article <[email protected]>,
    [email protected] says...
    > You misread the reason for calling it "Evolution, data only." The idea
    > behind the name is that additional channels are being added that support
    > only data, not voice. This is actually very similar to how GPRS and
    > EDGE work.
    >
    >

    Looks like I have some reading ahead of me.

    Thanks.

    --
    R
    O/Siris
    -+-
    A thing moderately good
    is not so good as it ought to be.
    Moderation in temper is always a virtue,
    but moderation in principle is always a vice.
    +Thomas Paine, "The Rights of Man", 1792+



  7. #7
    Kash76
    Guest

    Re: Vision vs. Voice

    O/Siris wrote:
    > In article <[email protected]>,
    > [email protected] says...
    >
    >>You misread the reason for calling it "Evolution, data only." The idea
    >>behind the name is that additional channels are being added that support
    >>only data, not voice. This is actually very similar to how GPRS and
    >>EDGE work.
    >>
    >>

    >
    > Looks like I have some reading ahead of me.
    >
    > Thanks.
    >

    I agree with O/Siris, unless the phone physically has two radios as I
    understand it DO will not do both at the same time. At least not in
    "rev a". DV will fix this. Maybe in a later version of DO will this be
    possible but we won't see it soon.



  8. #8
    Central
    Guest

    Re: Vision vs. Voice

    On Tue, 14 Jun 2005 22:20:15 -0500, Kash76 wrote:

    > O/Siris wrote:
    >> In article <[email protected]>,
    >> [email protected] says...
    >>
    >>>You misread the reason for calling it "Evolution, data only." The idea
    >>>behind the name is that additional channels are being added that support
    >>>only data, not voice. This is actually very similar to how GPRS and
    >>>EDGE work.
    >>>
    >>>

    >>
    >> Looks like I have some reading ahead of me.
    >>
    >> Thanks.
    >>

    > I agree with O/Siris, unless the phone physically has two radios as I
    > understand it DO will not do both at the same time. At least not in
    > "rev a". DV will fix this. Maybe in a later version of DO will this be
    > possible but we won't see it soon.


    Multiple physical radios are just the hardware interface the phone can
    encode data anyway it wants and by nature all connections are data. So
    wither or not you send voice or data it doesn't need two radios to send a
    mixed streams.




  9. #9
    Isaiah Beard
    Guest

    Re: Vision vs. Voice

    Kash76 wrote:
    > O/Siris wrote:


    > I agree with O/Siris, unless the phone physically has two radios as I
    > understand it DO will not do both at the same time.


    If you were right, then our phones wouldn't work right NOW. The ability
    to track multiple pilots is inherent in CDMA radios, and has been since
    day one. Look at the debug screen of your phone sometime and you'll
    find that your phone is contantly tracking PNs across three fingers of a
    rake receiver (plus one for roaming). This is what makes things like
    soft handoffs, and SMS during phone calls possible, and the same
    principle can be used in EV-DO. The ability for one physical MSM to
    multitask in this manner has always been a requirement.



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  10. #10
    Steve
    Guest

    Re: Vision vs. Voice


    "Isaiah Beard" <[email protected]> wrote in message
    news:[email protected]
    > Steve wrote:
    >> If this is something that can't be corrected, I think it makes SprintPCS
    >> inferior to T-Mobile and Cingular.

    >
    > That is entirely your opinion, which you're entitled to. Personally, it
    > hasn't been a big deal for me at all.


    It just seems that GSM customers on T-Mobile and Cingular basically have two
    options (data/voice) that can both work at the same time while SprintPCS
    customers are limited to only one option at a time. So if I'm downloading
    email or getting movie times on Vision, my calls dump to VM. This doesn't
    happen on T-Mobile and Cingular. It also seems this doesn't happen on
    Verizon. To me, it seems the one option at a time makes the network
    inferior. Like you said, just my opinion.





  11. #11
    Isaiah Beard
    Guest

    Re: Vision vs. Voice

    Steve wrote:
    > "Isaiah Beard" <sacredpoe[email protected]> wrote in message
    > news:[email protected]


    >>That is entirely your opinion, which you're entitled to. Personally, it
    >>hasn't been a big deal for me at all.

    >
    >
    > It just seems that GSM customers on T-Mobile and Cingular basically have two
    > options (data/voice) that can both work at the same time while SprintPCS
    > customers are limited to only one option at a time.


    You also mischaracterize T-Mobile. T-Mobile has yet to upgrade to EDGE,
    much less even think about UMTS. By many respects, some would consider
    that "inferior."

    > So if I'm downloading
    > email or getting movie times on Vision, my calls dump to VM. This doesn't
    > happen on T-Mobile and Cingular. It also seems this doesn't happen on
    > Verizon. To me, it seems the one option at a time makes the network
    > inferior. Like you said, just my opinion.


    And I didn't challenge it. If you itend to keep parroting your
    position, I can only assuming you're trying to start a debate.


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  12. #12
    Mij Adyaw
    Guest

    Re: Vision vs. Voice

    SprintPCS Vision RULES!!!! Especially for $10.00 unlimited and it performs
    very well.

    "Isaiah Beard" <[email protected]> wrote in message
    news:[email protected]
    > Steve wrote:
    >> "Isaiah Beard" <[email protected]> wrote in message
    >> news:[email protected]

    >
    >>>That is entirely your opinion, which you're entitled to. Personally, it
    >>>hasn't been a big deal for me at all.

    >>
    >>
    >> It just seems that GSM customers on T-Mobile and Cingular basically have
    >> two options (data/voice) that can both work at the same time while
    >> SprintPCS customers are limited to only one option at a time.

    >
    > You also mischaracterize T-Mobile. T-Mobile has yet to upgrade to EDGE,
    > much less even think about UMTS. By many respects, some would consider
    > that "inferior."
    >
    >> So if I'm downloading email or getting movie times on Vision, my calls
    >> dump to VM. This doesn't happen on T-Mobile and Cingular. It also seems
    >> this doesn't happen on Verizon. To me, it seems the one option at a time
    >> makes the network inferior. Like you said, just my opinion.

    >
    > And I didn't challenge it. If you itend to keep parroting your position,
    > I can only assuming you're trying to start a debate.
    >
    >
    > --
    > E-mail fudged to thwart spammers.
    > Transpose the c's and a's in my e-mail address to reply.






  13. #13
    Steve Sobol
    Guest

    Re: Vision vs. Voice

    Isaiah Beard wrote:

    > You also mischaracterize T-Mobile. T-Mobile has yet to upgrade to EDGE,


    Can a GSM provider use EDGE? I thought that was a TDMA thing.

    --
    JustThe.net - Steve Sobol / [email protected] / PGP: 0xE3AE35ED
    Coming to you from Southern California's High Desert, where the
    temperatures are as high as the gas prices! / 888.480.4NET (4638)

    "Life's like an hourglass glued to the table" --Anna Nalick, "Breathe"



  14. #14
    Oleg O.
    Guest

    Re: Vision vs. Voice

    In article <[email protected]>,
    Steve <[email protected](eye)name.com> wrote:
    >
    >It just seems that GSM customers on T-Mobile and Cingular basically have two
    >options (data/voice) that can both work at the same time while SprintPCS
    >customers are limited to only one option at a time. So if I'm downloading
    >email or getting movie times on Vision, my calls dump to VM.


    I think this last part is indeed a big shortcoming. Note that it's
    different than doing voice + data simultaneously (similar to call
    waiting versus two lines). I don't understand why the phone couldn't do
    "call waiting" while in data mode -- give some indication of an incoming
    call, and an option to interrupt the data connection and answer the
    call. It notifies of new VM and text messages while in data, so why
    couldn't it do that for calls.


    --
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    @ | <---- If expired, use this one.
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    .com | "Can you count to 1023 on your fingers?"



  15. #15
    Isaiah Beard
    Guest

    Re: Vision vs. Voice

    Steve Sobol wrote:
    > Isaiah Beard wrote:
    >
    >> You also mischaracterize T-Mobile. T-Mobile has yet to upgrade to EDGE,

    >
    >
    > Can a GSM provider use EDGE?


    Cingular certainly is. And E.D.G.E. does stand for "Enhanced Data for
    GSM Evolution."

    > I thought that was a TDMA thing.


    GSM does use TDMA as its signalling format.


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