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BDFL - Memuneh
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Topic # 16294 3-Oct-2007 11:26
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Have anyone experienced a loss of sound during phone calls with VFX? Sometimes in the middle of a call the sound goes away for a couple of seconds, neither party can hear each other, but the call is still connected.

Yesterday I noticed this happening during one call, while no other (significant) activity was going on my WAN interface. (probably just my Exchange Server and RSS Feeds updates in the background).

Currently connected on a 10 Mbps/2 Mbps cable modem service.

Ideas?





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  Reply # 89234 3-Oct-2007 11:30
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feel free to PM me the call details.. ie. time of call, A Party B Party Etc.

Thanks

Josh




 
 
 
 


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  Reply # 89247 3-Oct-2007 13:48
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I notice this abit on both my VFX and iTalk connections. iTalk seems to be marginally worse however. Not really enough to become a problem however.

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  Reply # 89256 3-Oct-2007 14:35
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We took a look at this, generally any loss of Audio will be due to packet loss and when it's reported we can can usually check the stas from the call to confirm this and in this reported case this is exactly what has happened, I think Josh has sent you the details on the call you questioned Mauricio correct me if I'm wrong Laughing,  it showed a reasonable amount of packet loss which would have coincided with the loss of audio, maybe related to the physical setup of the device or a slight connection issue but at first look possibly local network as we would have seen packet loss both ways if there was a general connection problem.




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Reply # 89266 3-Oct-2007 15:25
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This is what I am getting:



Pinging 58.28.20.150 with 32 bytes of data:
Reply from 58.28.20.150: bytes=32 time=21ms TTL=51
Reply from 58.28.20.150: bytes=32 time=19ms TTL=51
Reply from 58.28.20.150: bytes=32 time=23ms TTL=51
Reply from 58.28.20.150: bytes=32 time=19ms TTL=51
Reply from 58.28.20.150: bytes=32 time=19ms TTL=51
Reply from 58.28.20.150: bytes=32 time=31ms TTL=51
Reply from 58.28.20.150: bytes=32 time=19ms TTL=51
Reply from 58.28.20.150: bytes=32 time=22ms TTL=51
Reply from 58.28.20.150: bytes=32 time=28ms TTL=51

Ping statistics for 58.28.20.150:
Packets: Sent = 9, Received = 9, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 19ms, Maximum = 31ms, Average = 22ms

Tracing route to pan.wxnz.net [58.28.20.150]

over a maximum of 30 hops:


  1    <1 ms    <1 ms    <1 ms  192.168.2.1

  2    13 ms    13 ms    14 ms  203-97-253-1.cable.telstraclear.net [203.97.253.1]

  3     8 ms     9 ms     9 ms  ae0-840.ie4.telstraclear.net [203.167.223.114]

  4    17 ms    16 ms    15 ms  ge-1-2-0-842.ie2.telstraclear.net [218.101.61.109]

  5    61 ms    21 ms    23 ms  g1-0-927.u11.tspn.telstraclear.net [218.101.61.6]

  6    19 ms    19 ms    27 ms  ggis-gige-v906.telstraclear.net [203.98.18.67]

  7    19 ms    20 ms    22 ms  g0-1-0-4.akcr8.global-gateway.net.nz [210.55.202.49]

  8    20 ms    24 ms    27 ms  v4.aksw7.global-gateway.net.nz [210.55.202.51]

  9    22 ms    26 ms    24 ms  wxc-dom.aksw7.global-gateway.net.nz [203.96.116.54]

 10    22 ms    27 ms    20 ms  ge-0-0-0-akl-core3.wxnz.net [58.28.8.7]

 11    20 ms    19 ms    34 ms  pan.wxnz.net [58.28.20.150]


Trace complete.


Now, my Linksys is behind a Belkin router. Shall I try moving the Linksys to face the WAN and put the Belkin WiFi router behind it?





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  Reply # 89400 4-Oct-2007 08:48
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that may help, does the Linksys device have a static IP at the moment? perhaps try fixing its IP if not..

try downloading a small tool called WinMTR:

http://winmtr.sourceforge.net/

setup a ping to our Sip Proxy and just leave it running for a while.. perhaps set it off before a phone call.. it would be best to run the program from behind the Linksys device so that you will have the full path of the traffic in the trace, it should also indicate where the loss is taking place, you can then export the text and email it to me.. we can take a look from there..

Cheers

Josh






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Reply # 89401 4-Oct-2007 08:50
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Yes, all "server" devices in my LAN have static IP addresses.

I got a phone call yesterday and we decided I will be moving the Linksys to be the interface to the cable modem so I can benefit of QOS, and move the wireless router behind it - in effect swapping positions.

This will require a small reconfiguration in my network, so I am planning to do this later this week.




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  Reply # 89411 4-Oct-2007 09:28
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There have been quite a few people complain about poor throughout using Linksys's as a router. It might pay to check that things run OK afterwards.

Personally I'd upgrade your router to a a Linksys WRT54GL, I can set some good firmware up on it for you that does brilliant QoS.

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  Reply # 90418 10-Oct-2007 10:53
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I had a similiar problem here.  I could here them but they couldn't hear me.  However, in my house this seems to be caused by interference between my wireless phone and my wifi network. :)  Basically, I walked into the room with the phone basestation while both talking on the phone and surfing on my portable.  I then lost the channel.

Happens all the time to me.  Good thing we use the phone so rarely or I would have to turn off the wifi network! :)




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  Reply # 90433 10-Oct-2007 11:59
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Change to a DECT phone, the 2.4GHz phones are not good with WiFi which also runs at 2.4GHz.




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