Quote:
Originally Posted by gbm85
First of all, YOU need to go back and read where I said CDMA E911 IS aGPS.
Second, I never said aGPS was more accurate! I said it is easier to get a fix with aGPS. Most stand-alone GPS units will not get a fix inside, at all. Our crappy little Moguls with their tiny radios routinely get fixes inside.
Third, don't be such a ****ing ****. I wasn't rude with you, so you had no reason to be rude to me.
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aGPS is 'assisted' GPS. This means that triangulation of position via cell towers is used to assist the GPS in getting a lock. Essentially, they work together to get a faster lock on the GPS satellites. This is true for phones that have true GPS in them, like the mogul. However, not all CDMA phones have GPS technology in them, and those phones rely entirely on signal triangulation. Signal triantulation is slow, inaccurate, and useless for tracking movement. Many people (and cell phone sales people) refer to this technology as 'GPS' or 'aGPS', but it is not technically GPS at all.
Quote:
Originally Posted by frazell
Sounds right as calling 911 on my Mogul enters a "Emergency Mode" or something that I then have to exit out of. The phone stays in 1X the whole time it is in Emergency Mode too so I'm assuming it is keeping an open line to Sprint for the 911 station to ping.
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You are correct. The open line is needed to transmit your location to the 911 center, even after your call is ended (as long as you are still in emergency mode). The open line is also used as kind of a 'signal boost' to keep connection with towers and continue to report location based on signal triangulation. The phone switches to 1X so that it can use more transmission power and multiple towers, including those belonging to other CDMA networks. Some non-mogul phones stay in emergency mode until the next phone call is made or the power is cycled. Sometimes the user is not even aware that emergency mode exists.