Techs & Trends
questions n stuff
Im in the industry and go to seminars and tranings and visit web sites to know the most that i can about wireless service.
However I hear things from the "trainers" that i am unsure about....so i have some questions that i hope someone (looks at rich) can clear up for me
1) Nextel is IDEN for the two way and GSM for their normal service?
2) The 900 frequency has something to do with building penetration in the states, or entirely for international service?
3) Why does CDMA in general have a stronger signal strength? More towers? Better technology for signal strength? (building penetration or whatever)
4) Who is gonna benifit most from all these new technology switches? Verizon for going WCDMA? (are they even doing that?), ATT/...
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However I hear things from the "trainers" that i am unsure about....so i have some questions that i hope someone (looks at rich) can clear up for me
1) Nextel is IDEN for the two way and GSM for their normal service?
2) The 900 frequency has something to do with building penetration in the states, or entirely for international service?
3) Why does CDMA in general have a stronger signal strength? More towers? Better technology for signal strength? (building penetration or whatever)
4) Who is gonna benifit most from all these new technology switches? Verizon for going WCDMA? (are they even doing that?), ATT/...
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1.iDEN is for all Nextel services.
2.Some condor and all falcon phones are dual band. The lower the frequecny the better penetration you get.
3. It doesn't.
4. UMTS is WCDMA- WCDMA is a air interface for GSM networks.
2.Some condor and all falcon phones are dual band. The lower the frequecny the better penetration you get.
3. It doesn't.
4. UMTS is WCDMA- WCDMA is a air interface for GSM networks.
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Thanks for replying.
Is there anyone else willing to answer as well?
Id like more than one opinion if possible
Is there anyone else willing to answer as well?
Id like more than one opinion if possible
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About Iden: It is an alternate form of TDMA used exclusively by Nextel
About 900Mhz Band: In Europe the 900Mhz band is the frequency set used for wireless phones. In the USA 900Mhz has been designated by the FCC for short range products like cordless phones and the like.
About WCDMA: It is one of the two major 3G technologies deployed worldwide by wireless phone carriers.the other being CDMA2000. Verizon, Sprint, Alltel, US Cellular and others use CDMA2000 and already have 3G platforms. CDMA2000 at this time is the more efficient technology and the more advanced. It has the advantage of being backwards compatible with CDMA IS-95. WCDMA is not backwards compatible and has had significant startup problems. GSM and WCDMA cannot coexist in...
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About 900Mhz Band: In Europe the 900Mhz band is the frequency set used for wireless phones. In the USA 900Mhz has been designated by the FCC for short range products like cordless phones and the like.
About WCDMA: It is one of the two major 3G technologies deployed worldwide by wireless phone carriers.the other being CDMA2000. Verizon, Sprint, Alltel, US Cellular and others use CDMA2000 and already have 3G platforms. CDMA2000 at this time is the more efficient technology and the more advanced. It has the advantage of being backwards compatible with CDMA IS-95. WCDMA is not backwards compatible and has had significant startup problems. GSM and WCDMA cannot coexist in...
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1) Nextel uses a version of TDMA. IDEN was created by Motorola I think. That's why nextel uses exclusively Motorola.
2)900 is entirely international. North America uses 800(850) and 1900. 850mhz is a stronger signal and yes, it does penetrate buildings better.
3) CDMA does not have a stronger signal.
4) WCDMA is going to be implemented by GSM carriers only. In my opinion, wcdma will only be used in major metro's and have a gsm backbone(meaning if you can't get a wcdma signal, you'll get a gsm signal). It will be used for better data services mostly. As the technology grows it will probably be implemented in more cities. But, don't count on that happening any time soon. TDMA will probably be non-existent by the time a "national" roll...
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2)900 is entirely international. North America uses 800(850) and 1900. 850mhz is a stronger signal and yes, it does penetrate buildings better.
3) CDMA does not have a stronger signal.
4) WCDMA is going to be implemented by GSM carriers only. In my opinion, wcdma will only be used in major metro's and have a gsm backbone(meaning if you can't get a wcdma signal, you'll get a gsm signal). It will be used for better data services mostly. As the technology grows it will probably be implemented in more cities. But, don't count on that happening any time soon. TDMA will probably be non-existent by the time a "national" roll...
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Frosty007 said:
1) Nextel is IDEN for the two way and GSM for their normal service?.
No. iDEN all the way.
Both iDEN and GSM are technically based on a form of TDMA, but that does not make them compatible.
Motorola does (or used to) make a GSM/iDEN combo phone called the i2000, and there is another one - a Microsoft Smartphone - on the way. Those phones have GSM only for overseas roaming - the GSM part is not active in the U.S.
Also, there is sometimes confusion over the fact that Nextel phones have a SIM card that can be used in GSM phones overseas. That does NOT mean Nextel phones are actually GSM in any way - they're not. They just use SIM cards - that's it.
2) The 900 frequency ha...
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