I just got voip service and my brother set me up with a wireless linsys router (WRT54G). This router has a DD-WRT firmware v23 sp1. My brother has tried configuring Qos options but my voip calls still lack the quality, especially when calling international. I went out and bought a Hawkings Broadband Booster (HBB1) and it has improved somewhat the call quality but no great improvement. Can anyone give me the best configuration for Qos on the DD-WRT? I want to know if I am better off using a mac address priority or services priority. How much bandwidth to reserve for more important processes such as voip. Should I just keep the HBB1 and not mess around with the Qos on the router? Anyone's assistance is kindly appreciated.
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1 comment… read it below or add one
You definitely want to use service priority in this case, rather than MAC address.
Actually, I'll qualify that -- you want service priority UNLESS the VoIP phone itself is a separate device.
If the VoIP phone is a separate device, then MAC priority would be best for the phone specifically.
If you're just using your PC and a headset, then you want to go for service level. Reserve about 100kbits for VoIP if you can. You shouldn't really miss it. It's said that g.729 calls (compressed protocol) only take around 20k, but you're better to overestimate than underestimate that one.
Also I've seen digital burping when the processor gets loaded up with other stuff. It's not always about the bandwidth.
Make sure your phone application (if it's software) is running at the highest priority in Windows, because the decoding of G.729 can take some CPU power.
My boss and I talk over VoIP exclusively, and I can always tell when he launches an application or has something running because the conversation will start to blip and hang.
Same goes for the other side of the conversation if they're also VoIP.
Good luck!