babylon5
join:2008-01-15
| Voice Quality Issues When TA is Behind The Router
To all,
Even though I placed the DVG-5102S's ip address on the WRT54GS's TMZ zone, I am hearing "clicking" and "popping" sound for my incoming phone calls. It is rhythmic sound that occurs every 5 seconds. Furthermore, if I were to use one of the computers that is connected to the WRT54GS, the person whom I am talking to notices a decrease in voice quality.
Any suggestions on what should I check?
Thanks.
Babylon5 |
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priller
join:2000-10-20
Gainesville, VA
 ·voip.ms
·Callcentric
·Vonage
·callwithus
| "Clicking and Popping" are dropped RTP packets.
From your previous thread, wasn't this already working behind the router? Why change to the DMZ setup?
Did you configure QoS for the TA? On this screen...
»ui.linksys.com/files/WRT54GS/v5-···/qos.htm
... that's the best type of QoS that router will do. |
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babylon5
join:2008-01-15
| priller:
It was working behind the router; but ATT CV recommend that I placed the ip address in order to get the possible voice quality.
With regards to the QoS setup for WRT54GS, I have a few questions:
1. Do I only fill out the "Device Priority" and
"Eternet Port Priority" portion on this page?
2. Is the "Device Name" a free form text field?
Thanks.
Babylon5 |
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usa2k
Please PRAY for Rebekah
Premium,MVM
join:2003-01-26
Canton, MI
clubs: |  Any chance it is interference from a computer or other devices that are placed too close together? |
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babylon5
join:2008-01-15
| 
Equipment Setup |
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usa2k
Please PRAY for Rebekah
Premium,MVM
join:2003-01-26
Canton, MI
clubs:
·VOIPo
 ·WOW Internet and C..
·Broadvox Direct
| Is the Linksys and the Uniden both 5.8 Ghz?
Motorola Modem
DLink Voip Gateway
Linksys Wireless Router
Uniden Wireless Phone
So the DLink is ATT CV?
And then the router is behind that?
You could try more distance between components, but I have mine as close as you have. I have heard of a PC causing interference. I am wondering about the two wireless devices - especially so close.
Likely not a factor, but LinkSys had an issue in days gone by causing static on the phone line. The solution was to plug a cheap phone into the second unused phone port. That would be a real long-shot if that came up with another telephone Adapter!
Maybe the pic will spark ideas from others?
--
Jim, VoIP since 12/2002, VOIPo 2/7/2007
FAH-Tool ... Whales ... VOIPo Forum ... VOIPo Review |
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babylon5
join:2008-01-15
| usa2k: The LINKSYS is 2.4 Ghz while the Uniden is 5.8 Ghz thus the frequencies of both devices should be conflicting with one another.
Anyway, has anyone filled out the parameters that "priller" did on WRT54GS and could possibly send me a screen shot?
Thanks.
Babylon5 |
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n1zuk
My wood is stacked
Premium
join:2001-10-24
South Burlington, VT
·Future Nine Corpor..
·ViaTalk
·Comcast
| said by babylon5  :usa2k: The LINKSYS is 2.4 Ghz while the Uniden is 5.8 Ghz thus the frequencies of both devices should be conflicting with one another. Two things to consider:
1> A number of "5.6 GHz" phones only use 5.6GHz for data from the base to the handset. They use 2.4 GHz for the path from the handset to the base.
2> Anytime you put two radio transceivers (in your case, a telephone and wireless router) near each other, the receiving sections can suffer from fundamental overload, where it doesn't matter what frequency the radio is supposed to receive, it just gets swamped by strong RF.
--
New to Forum Life? Click here and learn. |
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voipMatt
join:2008-07-30
Birmingham, AL | reply to babylon5
Have you tried the ATA in front of the Router to see if it continues? |
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babylon5
join:2008-01-15
| voipMatt: Previously, my ATA used to be in front of the router; but because my ip address is "dynamic", it is causing service interruption each time that the ip address changes. Ever since I put my ATA behind the router, this has not been happening. Unfortunately, I have "voice quality" issues where I am hearing a "clicking" sound (sounds more like a "bell") when I speak with someone
n1zuk: Do you have any suggestions on my setup? |
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voipMatt
join:2008-07-30
Birmingham, AL | I would remove as many devices out of the equation to simplify troubleshooting. ie. router, cordless phone.
Clear up some of that RF, and retest.
Also, have you tried changing codecs for kicks? |
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veloscaper
join:2006-07-19
90120 | reply to babylon5
have you checked your broadband speeds? make sure the speeds are consistent as well. |
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mazilo
From Mazilo
Premium
join:2002-05-30
Lilburn, GA
| reply to n1zuk
said by n1zuk :1> A number of "5.6 GHz" phones only use 5.6GHz for data from the base to the handset. They use 2.4 GHz for the path from the handset to the base. I never heard of this before, if this is true, then what you said below will hold true for the phone to interfere itself operating on two different frequencies, let alone it will cost more to manufacture the phone. 
2> Anytime you put two radio transceivers (in your case, a telephone and wireless router) near each other, the receiving sections can suffer from fundamental overload, where it doesn't matter what frequency the radio is supposed to receive, it just gets swamped by strong RF. I used to visit a friend whose house was a block away from a local TV station with big antenna. The TV reception on this as well as other channels was pretty clear and never caused any conflict (no snow/ghost effects) on other TV channels even though TV broadcast stations from other channels were far away from the house. Does this mean a TV set had been designed with a built-in circuitry to eliminate such an RF interference? Anyway, since it won't cause too much of an effort, I would strongly suggest to apply the above to see if the interference will drop.
--
Mazilo always prays for FREEBIES!
US Phone: +1-678-601-0907
UK Phone: +44-703-194-2574
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n1zuk
My wood is stacked
Premium
join:2001-10-24
South Burlington, VT
·Future Nine Corpor..
·ViaTalk
·Comcast
| said by mazilo :said by n1zuk :1> A number of "5.6 GHz" phones only use 5.6GHz for data from the base to the handset. They use 2.4 GHz for the path from the handset to the base. I never heard of this before, if this is true, then what you said below will hold true for the phone to interfere itself operating on two different frequencies, let alone it will cost more to manufacture the phone. I hate to sidetrack this thread, but this is what I found a couple of years ago, when looking to replace a dead telephone in my bedroom. I was surprised when I learned of this, but decided to reject a couple of models I was interested in because of it.
You have to look at the specs on the package to find this out, as the marketing guys like to put a big 5.6 MHZ on it, so you think you are getting the newest and best thing out there. (It's only half true)
5.6 GHZ, while having the potential of having the clearest sound and least potential interference, also has its shortcomings. At the same RF power output, it has less range. It also is more reliant of "line of sight", with things like walls more likely to block signals. But I believe it is all about power.
During a telephone conversation, the telephone and base are both operating in full duplex (both a transmitter and a receiver operating at the same 100% of the time). Unlike a walkie talkie, where it is either transmitting or receiving, a cordless phone can not share much (any?) radio circuitry.
Since each one needs both a dedicated radio transmitter and receiver, why do they need to be on the same frequency? By putting a 2.4 GHz transmitter and 5.6 GHz receiver in the handset (the opposite in the base), I can quickly think of two benefits:
-- Lower RF power (and corresponding battery power drain) is needed for the same coverage on 5.6 GHz.
-- Less filtering needed for adjacent signal interference, as a big problem of duplex radio systems is that they tend to interfere with themselves.
--
New to Forum Life? Click here and learn. |
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