Talk:2G CDMA (IS-95)
there needs to be some major changes in these descriptions. First off, IS-95 is the ACTUAL first CDMACode Division Multiple Access cellular standard, not GSM. GSM is the second CDMACode Division Multiple Access standard. it is not 2G after further reading, it is actually a 1G signal (not related to our parent AMPS from europe).
3G is defined by IMT-2000, (which It also means cdma2000, and accidentally changed the description on what really should be "3G mobile data" NOT 3G WCDMA.), as 3G was developed in 2008. Also the reason why there is double 3G networks is because so it can support more users with more slots per sub-channels.-->(the little "hilly things", four per 1.25 MHzMegaHertz (MHz) 10^6 Hz channel.), Just like 4G has sub channels in their networks, but 4G has a much larger span of users. Hopefully this clears up a bunch of melarkey.
I was also going to clear up something else in this page. I actually cant find a correct sample for this 1st generation mobile sound...lol. So the sample provided for this signal needs to be changed for accuracy (if we can find it hopefully) as its a repeat of the CDMA2000 signal... Yalek W (talk)
I rewrote the article to provide a better description of IS-95, although at a rather high level; technical details are largely missing. All content has cited reputable sources. Hopefully this continues.
I also removed dead links, and the CDMA2000 sample that was not appropriate for this page. Page history will retain this content, so it is not lost.
1G indicates a standard with analog voice that can be intercepted with an analog scanner; 0G indicates a standard that is not cellular in nature (no handoff support, not trunked, and/or does not support direct dialing). As cdmaOne uses digital signals for both voice and control, it is a 2G standard. --Kj6psg (talk) 21:28, 11 October 2023 (NZDT)
I added a Drive link and an audio sample that represents the true IS-95 signal. Although it's from a CDMA2000 base station, it's still a voice/text-only channel so it should be backwards compatible with IS-95.
IS-95 and 1xRTT share the same channel structure (pilot, sync, paging and traffic), with only difference being the added 64 Walsh codes for capacity. Otherwise it's the same signal. I recorded this sample to show the example of a CDMACode Division Multiple Access channel handling voice. Traffic channel (identified by the 800hz tone) fluctuates in intensity due to forward link power control. --Wellboy (talk) 14:15, 14 November 2023 (ULAT)
THANK YOU THANK YOU THANK YOU @Wellboy. Im GLAD you found these signals and FINALLY changed them to the *right* samples. I would also advise putting this information on the long description so this way we actually have the correct stuff. But THANK YOU SO MUCH FOR FINDING THIS!! If you want, can you also post the correct waterfall images in case if you had an SDR? -> ->Yalek W (talk)
I don't have an SDR, just an RFRadio Frequency Detector connected to an audio amplifier. I used a smartphone to record it. So the quality of the sample isn't perfect. But anyway, looking forward to it. Next time I buy an SDR I will update the old waterfall with a new one. -> ->Wellboy (talk)
