Forum Thread

need ddwrt QoS setup help to prioritize obitalk and google voice

seanzie 3,410 320 July 6, 2011 at 01:05 AM
Hi I have a linksys wrt54g router flashed with ddwrt. I need assistance setting up QoS to prioritize google voice and obitalk over all other traffic. I shoot video and am constantly uploading HD video to youtube. When I am uploading my phone works but has like a 3 second delay in phone conversations and sounds staticky. I am familiar with ddwrt but basically need to know what udp/tcp ports to setup in the QoS and any other associated and helpful information. help me get my phone abilities back during uploads please slickdealers! thanks in advance!

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#2
Easiest is just to get the MAC address of your phone, then in QoS options, add your MAC address and give it the highest priority
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#3
Google search for what ports your VoIP applications use and then add them to QoS. There's no simple answer here, you're going to have to do some legwork.
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#4
Quote from seanzie View Post :
I am familiar with ddwrt but basically need to know what udp/tcp ports to setup in the QoS and any other associated and helpful information. help me get my phone abilities back during uploads please slickdealers! thanks in advance!
There are two parts to a phone call. The setup part (which typically goes over UDP5060) and the RTP part. You don't care about 5060 with regards to QoS - if the network is so bad that the setup is failing you will have no chance with voice.

What you do care about is the RTP part. The client, in your case obitalk and google voice, specify what range of ports to use so you must also apply QoS to all of them. You can probably find the range online somewhere. Unfortunately, while there are RFCs to follow, *any* range can be used (within the usual boundaries of opening ports)
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#5
I called obihai and they said with google voice there is no way to prioritize with QoS. if someone knows how to please let me know.
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#6
http://code.google.com/support/bi...swer=62464

See if that helps. Your other option is simply to try and give upload traffic for files, etc. a very low priority so by default your VoIP communications should be a higher priority. Definitely worth a shot.
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#7
okay so i tried setting up some QoS and now I get no dial tone on my obihai. So I factory reset my ddwrt fflashed linksys router and still no dial tone. real bummer, this is my only phone at the moment Frown
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#8
Quote from seanzie View Post :
okay so i tried setting up some QoS and now I get no dial tone on my obihai. So I factory reset my ddwrt fflashed linksys router and still no dial tone. real bummer, this is my only phone at the moment Frown
That means the 5060 part is failing to get through. Your phone has to send REGISTER messages periodically. Wireshark is your friend here... fire it up and powercycle the phone. You should see something like the following transaction

outbound ---> REGISTER
inbound <--- 401 unauthorized
outbound --> REGISTER
inbound <--- 200 OK
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#9
Quote from brbubba View Post :
http://code.google.com/support/bi...swer=62464

See if that helps. Your other option is simply to try and give upload traffic for files, etc. a very low priority so by default your VoIP communications should be a higher priority. Definitely worth a shot.
There's a better way. Everything has a default QoS class of Standard, so if you set the ATA to the Premium class, it will automatically have a higher priority than everything else on the network.
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#10
Quote from vivahate View Post :
That means the 5060 part is failing to get through. Your phone has to send REGISTER messages periodically. Wireshark is your friend here... fire it up and powercycle the phone. You should see something like the following transaction

outbound ---> REGISTER
inbound <--- 401 unauthorized
outbound --> REGISTER
inbound <--- 200 OK
not really sure how to use wireshark too well. i do have it installed but i dont know how to capture only port 5060 or only ip 192.168.1.111 and because of that, i just see LOTS Of data going through wireshark...

obihai wants to send me a new device but i dont think thats going to fix the problem....
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#11
Quote from seanzie View Post :
not really sure how to use wireshark too well. i do have it installed but i dont know how to capture only port 5060 or only ip 192.168.1.111 and because of that, i just see LOTS Of data going through wireshark...

obihai wants to send me a new device but i dont think thats going to fix the problem....
I told you the wrong thing anyway :-) I was forgetting that you're not using a softphone

If you want to try again, you'll need to capture everything via tcpdump on the router (something like tcpdump -i eth0 -w myfile.out) and then copy it over to a PC with wireshark. Open the file up and put the following in the filter bar

UDP.PORT == 5060

and you should see the REGISTER message go out and see the response from the far-end.
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#12
honestly i think somehow the obihai bit the dust? i'm not sure why or how? it was working before i played with the QoS stuff in my ddwrt. but since then i've flashed the linksys to tomato and tried different actual phones to plug into the obiihai. i've power cycled the obihai multiple ways. i factory reset my router and the obihai. google voice works. magic jack works. obihai still has no dial tone or anything... not sure how it died but it seems dead...
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#13
Quote from seanzie View Post :
honestly i think somehow the obihai bit the dust? i'm not sure why or how? it was working before i played with the QoS stuff in my ddwrt. but since then i've flashed the linksys to tomato and tried different actual phones to plug into the obiihai. i've power cycled the obihai multiple ways. i factory reset my router and the obihai. google voice works. magic jack works. obihai still has no dial tone or anything... not sure how it died but it seems dead...
Tomato QoS is generally known to work better than DDWRT, although it is possible they fixed many of their problems. Can you try hooking the Obihai up directly to the cable/dsl modem, i.e., bypass the router just to test it?
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