Programming Code for Nokia 5100 GSM

[Sergo10]

I am just curious, to know if the Nokia 5100 GSM have a programming code like the TDMA nokias?

Sergo10 8-) :

[Yotamz]

no, gsm phones don't have such programming code. the reason is that all the information that is stored on the phone in tdma models, is stored on the sim.

[twr7cx]

I've never heared of TDMA. But we have CDMA here in Australia, are the two similar?

[Fulmens]

I've never heared of TDMA. But we have CDMA here in Australia, are the two similar?


no, they are different.

tdma = time division multiple access.

basically, a single line is divided into 3 parts, so that 3 people can share 1 line (not a single phone number, but a channel). so every split second the channel switches from person to person. it would go something like person 1, person 2, person 3, person 1, person 2, person 3, etc...

cdma= code division multiple acces.

here, when you make a call, your voice gets digitally coded and thrown into the air. then the person you are calling "cracks" your code and receives your voice. so basically it would be like if there was a room full of people from different nationalities, speaking french, english, dutch, chinese, etc. you are hearing everybody talk at the same time, but you cannot understand what they are saying. you cannot communicate. suddenly, somebody starts speaking english, so you can finally communicate and have a conversation you can understand.

anything else, let me know!!!

[Yotamz]

@Fulmens

nice reply :)

-edit-
just for information. tdma is only used in america, in israel...and maybe some other area.
cdma is mostly used in the east - japan, australia (and also israel).

tdma and older cdma phones didn't have simcards or simcard slots, and so the information had to be programmed on the phone itself, using programming codes.

[twr7cx]

tdma and older cdma phones didn't have simcards or simcard slots, and so the information had to be programmed on the phone itself, using programming codes.
My friend has a Nokia 2-something or other, he recently purchased it new, it has a blue screen and looks kind of similar to the Nokia 2100. It's CDMA, and doesn't take a Sim Card - we've been trying for a while to figure out why. It does have a sim card slo thing, but it doesn't work...

[twr7cx]

I think amybe it is a Nokia 2280 or something...

[Fulmens]

My friend has a Nokia 2-something or other, he recently purchased it new, it has a blue screen and looks kind of similar to the Nokia 2100. It's CDMA, and doesn't take a Sim Card - we've been trying for a while to figure out why. It does have a sim card slo thing, but it doesn't work...

this is a new trend in CDMA phones. the people who support CDMA realised that GSM had a great idea in their SIM cards, and decided to add them to their phones. however, the SIM cards are not the same, that is why they dont work.

see, GSM has the SIM, now CDMA has the R-UIM. eventhough they look and feel the same, they work completelly different. and besides, you cannot make a CDMA phone work as a GSM phone. they are completelly different technologies.

ps. there is a third kind of SIM. it is used in the USA, and possibly somewhere else. they also call it SIM, but it is used for I-DEN technology, different from gsm and cdma.

[EdgeCrusher]

really, good answers fulmens... and, i've never heard of it... what is I-DEN?

Edge

[Yotamz]

i-den is not a very wide-used technology. don't know where it is used (i know about israel.. for some reason each of the providers here uses a different technology).

the advantage of this technology is it's ptt (push-to-talk) capability. it had ptt from the beginning, and was the only technology to support that kind of communication. today gsm has it also, but it is slower (takes 2-3 seconds from the time you push untill you can talk) in i-den the message is delivered instantly, or at least almost instantly.

[EdgeCrusher]

would you tell me how does it generates the link between the two handsets so fast? we here have NexTel, they provide the same service, PTT, but, i think it's really a radiolink, because the handsets are from them, though in the last days i've started to see some advices that shows the Motorola T720 available from them.. so i'm not sure about this.

Anyways, how is generated the link between the handsets in the I-DEN technology? I'm really curious about this... I've found this very very interesting, and this seems to be the place to learn...

Thanks people for answering my questions, and sorry for any bother please....

Edge