TDMA

What does TDMA mean?

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› See More: TDMA

Typing TDMA into Google brings this up (as well as hundreds of others):
http://www.webopedia.com/TERM/T/TDMA.html
Time Division Multiple Access

From:Sarge
[email protected]

> What does TDMA mean?

"BruceR" <[email protected]> wrote in message
news:[email protected]...
> Typing TDMA into Google brings this up (as well as hundreds of others):
> http://www.webopedia.com/TERM/T/TDMA.html
> Time Division Multiple Access
>
> From:Sarge
> [email protected]
>
>> What does TDMA mean?

dang never thought about google, sorry. Mainly I'm wondering if I get my
daughte-in-law a phone that says TDMA can she put her sim card in and use
it. Both er card and the phone are ATT.

No. The AT&T TDMA phones are an older generation and do not use a SIM as
they're not GSM. What you want is a GSM phone.

From:Sarge
[email protected]

> "BruceR" <[email protected]> wrote in message
> news:[email protected]...
>> Typing TDMA into Google brings this up (as well as hundreds of
>> others): http://www.webopedia.com/TERM/T/TDMA.html
>> Time Division Multiple Access
>>
>> From:Sarge
>> [email protected]
>>
>>> What does TDMA mean?
>
> dang never thought about google, sorry. Mainly I'm wondering if I get
> my daughte-in-law a phone that says TDMA can she put her sim card in
> and use it. Both er card and the phone are ATT.

"BruceR" <[email protected]> wrote in message
news:[email protected]...
> No. The AT&T TDMA phones are an older generation and do not use a SIM as
> they're not GSM. What you want is a GSM phone.
>
Thank you very much! Good thing I asked some folks who know. LOL!

On Sun, 23 Oct 2005 22:02:17 -0500, "Sarge" <[email protected]> wrote:

>What does TDMA mean?
>
Time Division Multiple Access.
In D-AMPS/IS-136 (which is what many call TDMA service in the USA),
and GSM, each channel is subdivided into time slots, and each user on
the channel is assigned a time slot to transmit into, or receive from.
At any other time, the channel is either empty, or used by someone
else. In order to insure that transmissions arrive with the assigned
slot (which is only about 600 microseconds wide), GSM phones have a
feature called timing advance which adjust the transmit timing
according to distance from the Base. This is where range limit comes
from in GSM, unless you are willing to sacrafice the adjoining time
slot (and in Rural Australia, some actually do, but it reduces the
channel capacity from 8 calls to 4 calls).

I believe there are only 3 channels in D-AMPS/IS-136, and they are
much much wider than they are in GSM (IIRC, about 25 millseconds), so
timing is much less of an issue. The other benefit is the transmit
rate is generally below what most sound equipment will reliably
reproduce, so interference from D-AMPS/IS-136 is uncommon, whereas
just about everyone who uses GSM equipment has heard the 217 hz
buzz;;;

AT&T sold the Siemens S46 that had both TDMA and GSM modes.

Check this link for a description:
http://www.impactcommunication.com/p...iemens_s46.htm


"BruceR" <[email protected]> wrote in message
news:[email protected]...
> No. The AT&T TDMA phones are an older generation and do not use a SIM as
> they're not GSM. What you want is a GSM phone.
>
> From:Sarge
> [email protected]
>
>> "BruceR" <[email protected]> wrote in message
>> news:[email protected]...
>>> Typing TDMA into Google brings this up (as well as hundreds of
>>> others): http://www.webopedia.com/TERM/T/TDMA.html
>>> Time Division Multiple Access
>>>
>>> From:Sarge
>>> [email protected]
>>>
>>>> What does TDMA mean?
>>
>> dang never thought about google, sorry. Mainly I'm wondering if I get
>> my daughte-in-law a phone that says TDMA can she put her sim card in
>> and use it. Both er card and the phone are ATT.
>
>

"matt weber" <[email protected]> wrote in message
news[email protected]...
> On Sun, 23 Oct 2005 22:02:17 -0500, "Sarge" <[email protected]> wrote:
>

OK Matt, I see. Kinda like our 800 trunked system we used at the Sheriff's
Dept.
Great explanation.

"Slick" <[email protected]> wrote in message
news:m6A7f.7111$tl5.5918@trnddc02...
> AT&T sold the Siemens S46 that had both TDMA and GSM modes.
>
> Check this link for a description:
> http://www.impactcommunication.com/p...iemens_s46.htm

Now thats nice. Thanks Slick!
I'm just trying to find my step daughter a good used phone she can pop her
SIM into and use it on my plan. I know VERY little about cell phones, lol!.