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Old 06-16-2008, 03:11 PM   #1 (permalink)
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Exclamation crappy voice over wifi....

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I have my blackberry using wifi as the main source of reception , if I am at my work or at home....and often at work, its really crappy. I have 4-5 bars though, but at times its just choppy, and I can hear every other word.

Also, I thought I could span off wifi and onto UMA seamlessly, but I often loose connection, and it never actually goes over fine. It drops and says call failed...

T-mobile curve btw.
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Old 06-16-2008, 03:23 PM   #2 (permalink)
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What version of the handheld software are you running?


Quote:
Originally Posted by vivithemage View Post
I have my blackberry using wifi as the main source of reception , if I am at my work or at home....and often at work, its really crappy. I have 4-5 bars though, but at times its just choppy, and I can hear every other word.

Also, I thought I could span off wifi and onto UMA seamlessly, but I often loose connection, and it never actually goes over fine. It drops and says call failed...

T-mobile curve btw.
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Old 06-16-2008, 03:35 PM   #3 (permalink)
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v4.2.2.180 (platform 2.5.0.36)
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Old 06-16-2008, 03:49 PM   #4 (permalink)
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Jumpig to a conclusion here - there could be a lot of latency on the IP side, in your Internet routing between you & T-Mo
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Old 06-16-2008, 03:53 PM   #5 (permalink)
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well, this happens at home too...and I have a 50mb down and 10mb up connection.

work is much better...so I dont know why it'd do this, let alone not switch to UMA seamlessly.... :(. I hate that it drops calls. I have to sit in my wireless bubble before I end the call, just so I dont lose connection.
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Old 06-16-2008, 04:01 PM   #6 (permalink)
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poor quality router or lots of interference in your area. also, turning QoS on in your router's settings will help prioritize data on the network and prevent dropped calls.
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Old 06-16-2008, 04:22 PM   #7 (permalink)
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QoS is enabled at work, we have high quality cisco APs...at home, I wont enable QoS , as it boggles my wireless network pretty bad.

I have been voice quality at home, then at work on the cheapo linksys router with dd-wrt on it.....

stil does not make sense why I cannot seamless swap from router to UMA....
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Old 06-16-2008, 04:41 PM   #8 (permalink)
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Quote:
Originally Posted by vivithemage View Post

stil does not make sense why I cannot seamless swap from router to UMA....
actually, it does if you think about it.

it works just like a cell site... as soon as signal begins to fade, the phone will search for the next stronger signal, anticipate that you're moving towards it, then drop the previous signal once it has a lock on the new one.

now if the "tower" you're currently on is already weak, and is exacerbated by having your preferences set to "wi-fi preferred" forcing your phone to hang on to the weaker signal by preference, it will fail the handoff by losing the first signal too soon before it can transfer the signal to the next tower.

if you can get to a strong wifi signal, you can test it... get on a call at a wifi hotspot that's strong and clear. then get in your car and drive away really fast... it'll drop during the handoff as the wifi signal range is very finite and if you dont give it time for a proper handoff, the signal will fade before the call can be transferred to cellular.

it was much worse when i was beta testing UMA 2 years ago. it always dropped when leaving a wifi hotspot, but would always handoff when moving into a hotspot from cellular.
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Old 06-16-2008, 04:48 PM   #9 (permalink)
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also, never mind the "bars" for reception. what's the actual decibel per meter reading on the phone when you go to manage connections > wi-fi options > (your access point) > network details?

on my home connection, my signal strength usually remains between -45dBm and -85dBm around the house, and will xfer to cellular once i cross over -100dBm or so.
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Old 06-16-2008, 06:54 PM   #10 (permalink)
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At home, I am usually 1-2 feet from my Router, and at most 15-20 feet.

Walking away from my AP shouldn't drop the call though... :(

Is there a way to use WIFI typically, unless UMA has a better reception?
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Old 06-16-2008, 07:08 PM   #11 (permalink)
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I had this problem when I had verizon fios, apparently UMA didn't like my router. Once I swtiched back to my Linksys router, UMA works like a charm
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Old 06-17-2008, 09:16 AM   #12 (permalink)
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After 3 attempts at UMA, (2 8320s and currently an 8120), replacing my router twice, and way too much time speaking with customer service, I have concluded:

1. Bluetooth headsets conflict with Wi-fi and will cause dropped calls.
2. Anytime my Time Warner digital phone is used I drop calls.
3. Becasue there isn't a strong cell signal for my Wi-fi calls to hand-off to I drop calls.
4. Dropped calls have more to do with RIMM's lack of appropriate software.
5. The router probably is not the problem. I have tried 2 new routers with no better results.

The last contact I had with CS, I was told that things should improve with 4.5 or 4.6. But isn't that typical? The silver bullet is always in the next software upgrade.

Carriers and/or RIMM should provide reimbursements to those of us who have purchased their equipment and
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Old 06-17-2008, 09:17 AM   #13 (permalink)
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FYI ... BlackBerry voice calls over WiFi = UMA ... UMA doesn't have bars. If you're seeing bars, you're probably not seeing UMA, no?
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Old 06-17-2008, 12:18 PM   #14 (permalink)
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this happens to me too at home, and I know that my verzion-supplied "Free" actiontec (*cough* craptiontec) router could have something to do with it because it really is a horrible device. What I don't understand at all is how the signal can fluctuate so much if I am standing still. It makes sense that if I walk to the other end of my apartment to some remote corner that the signal would get weak, but if I am sitting still?

Brian, the rep at my local TM store said "it's probably due to the weather" but I have serious doubts about that. I had hoped that using UMA would eliminate the need for me to have a home phone but I am getting worried that I might be paying $10 a month for "maybe you can have a complete call sometimes" not sure if this is a blackberry issue or a TM issue... either way this is very distressing :(
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Old 06-17-2008, 01:35 PM   #15 (permalink)
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Quote:
Originally Posted by jgreg View Post
After 3 attempts at UMA, (2 8320s and currently an 8120), replacing my router twice, and way too much time speaking with customer service, I have concluded:

1. Bluetooth headsets conflict with Wi-fi and will cause dropped calls.
2. Anytime my Time Warner digital phone is used I drop calls.
3. Becasue there isn't a strong cell signal for my Wi-fi calls to hand-off to I drop calls.
4. Dropped calls have more to do with RIMM's lack of appropriate software.
5. The router probably is not the problem. I have tried 2 new routers with no better results.

The last contact I had with CS, I was told that things should improve with 4.5 or 4.6. But isn't that typical? The silver bullet is always in the next software upgrade.

Carriers and/or RIMM should provide reimbursements to those of us who have purchased their equipment and
1. incorrect. two technologies prevent this: spread spectrum and frequency hopping. there is a known issue with the 8320 though, as the current OS's bluetooth stack has a conflict only with the headset profile and with certain headsets. if this were truly the case, your cordless phone, your wireless keyboard and mouse, possibly your universal remote, and bluetooth data transfers would all come crashing down, as many of these products all share the 2.4GHz spectrum. i had two headsets that didnt work with my 8320 during UMA calls... i now have one that does after a little research.

2. that's because they're both fighting for the same bandwidth and priority. voice calls over IP are all treated with the highest priority, especially on a router designed for VoIP. because of this, they can and will conflict if your router is not designed to handle multiple VoIP streams.

3. correct.

4. incorrect. it's the way GSM performs cell to cell handoffs. it uses a hard handoff as opposed to CDMA's use of a soft handoff. GSM will locate the nearest signal you are moving towards and once its signal exceeds the current signal, it drops the previous and continues the transmission on the next cell. CDMA negotiates between multiple cell sites, constantly increasing the gain until the device maxes out and finally drops the previous cell. this is why CDMA devices tend to have much poorer battery life especially when the device is equally distanced between 2 cells compared to similar GSM devices. simple terms: GSM connects to the single strongest signal while CDMA connects to two and tries to compare them. it also means CDMA tends to have fewer dropped calls especially while in motion.

5. with many other users, like myself, not having a problem after setting our routers correctly, how can you wholly blame the device?
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Last edited by oakie : 06-17-2008 at 01:38 PM.
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Old 06-17-2008, 01:45 PM   #16 (permalink)
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Quote:
Originally Posted by vivithemage View Post
At home, I am usually 1-2 feet from my Router, and at most 15-20 feet.

Walking away from my AP shouldn't drop the call though... :(

Is there a way to use WIFI typically, unless UMA has a better reception?
how much insulation does your home have? density of construction materials? location of your router? your router's total power output? other devices that may emit interference? your current router settings?

how's your cellular signal strength in your home?

these are all factors in your UMA call quality.

WIFI, when used for mobile VoIP calling, is called UMA, or Unlicensed Mobile Access.

like i said previously, turning on the QoS setting is REQUIRED to use any form of VoIP calling, be it with your mobile or with a broadband phone. the setting allows your router to prioritize certain data transmissions, specifically giving Voice over IP data higher priority than another computer in your home surfing the internet. without turning it on, it treats your VoIP transmission (your call) as simple, average data, that can be interrupted at any time another computer on the network makes a request.

if for some reason, other than "turning it on screws up my other computers", you dont want to or feel comfortable modifying the settings on your router and reestablishing your other computers on your network after the settings have been changed, you can buy a new router from T-Mobile for $30 that already has the proper settings applied for UMA calling.

bottom line, until you turn on QoS on your router, you will continue to have connection problems in your home with UMA.
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Last edited by oakie : 06-17-2008 at 01:50 PM.
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