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Steve Punter
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<<fDwlb.238188$ko%.2776@news04.bloor.is.net.cable.rogers.com>> "Steve
Punter" <punter1445@rogers.com> did ramble:
>CDMA is uniquely suited for this sort of thing, since the number of BITS any
>given conversation uses is variable. The complicated part would be the
>installation of the CODEC in the switch, but that wouldn't be a huge
>hardship.
Maybe I'm wrong, but wouldn't the toughest part being installing the
codec in the handsets?
>It is unfortunately more complicated for GSM operators, in that the
>bandwidth of a slot is fixed, and to give a caller greater bandwidth would
>require using two full slots (a doubling of network resources used in each
>call). It could be done, but not as economically.
TDMA based protocols (TDMA, GSM, iDEN) all have this issue, but it still
might be possible to rework the protocol a little, split current slots
into 1/2 the current size, issue a double for "normal" calls and a
triple for higher quality calls.

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Steve Punter - 23 Oct 2003 13:38 GMT
>Maybe I'm wrong, but wouldn't the toughest part being
>installing the codec in the handsets?
From the provider's standpoint no. By the time any new CODEC was released
for installation on a network there would be at least one or two handsets
already available that used it. As for the subscribers wishing to get the
hifi CODEC, they would of course buy one of those phones.
>TDMA based protocols (TDMA, GSM, iDEN) all have this issue,
>but it still might be possible to rework the protocol a little,
>split current slots into 1/2 the current size, issue a double
>for "normal" calls and a triple for higher quality calls.
Exactly, it can be done, but it would be MORE COMPLICATED.

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Steve Punter
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