said by mcf57 :

I have gone through several VoIP providers with my Comcast HSI connection. All of them have had quality issues. ViaTalk, PhonePower, Broadvoice and Voicepulse. I am thinking of going with Vonage since my in-laws have had great success with them. However, they have Vonage over a AT&T DSL line.

I am wondering if Comcast was the reason in the first place that I have had issues with these other Voip carriers. I seemed to have tried EVERYTHING to help correct the issues; changed router from Netgear to Linksys, changed phone, put ATA between modem and router, etc. Nothing worked. I sometimes wondered if Comcast has limited VoIP traffic in hopes that customers will just go with the Comcast VoIP.

I then have read how others have complained about VoIP quality over Comcast. I also have read that Comcast & Vonage had come to an agreement back in 2008 about Vonage traffic over Comcast network. Will I still have the same quality issues as before with Comcast & Vonage? Has anybody had good success with Vonage & Comcast? I even recently got a new DOCSIS 3.0 modem and have their 22Mbs service so I know its not a speed issue.

said by mcf57 :

Yes, I did change my router. Went from a Netgear to a Linksys & still had audio dropouts. I was told by one VoIP provider to tell Comcast the following to help correct my issues:

You need to tell them that you have run several speed tests, and your line shows evidence of packet queuing in every test you run. Tell them that this causes interruptions whenever you stream media, and that you need them to address the QUALITY issues on the line. Make sure to stress to them that it is not a throughput or speed issue, but a QUALITY of connection issue

I contacted Comcast several times and this approach produced absolutely no results. Everytime, the tech rep has simply told me that everything looks good for my line from their end.

I'm gonna maybe give this one last try. Give Vonage a shot as my last choice. If they don't work out, I guess I'll either just stay with AT&T (UGHHH!!) or possibly go with a Comcast triple bundle & then have Comcast phone service. Ultimately not what I want to do, but I may not have a choice at this point. We'll see.

said by mcf57 :

Actually, this is one one of the main reasons I switched routers. The Netgear router I had didn't seem to have any kind of QoS settings. I replaced it with a Linksys WRT54G cause I had heard it was one of the better routers for VoIP. I then proceeded to adjust its QoS settings to give the VoIP adapter the highest priority for traffic. This still did not fully help.

I haven't tried Vonage yet so not sure which adapter device I will get. As stated, they will be my next attempt. As for the past tries, I was with Broadvoice, Voicepulse, Viatalk and most recently, Phone Power. The last two were under a BYOD plan and I was using a Grandstream HT502. I was using a supplied Linksys PAPT for VoicePulse and another company supplied adapter (can't remember the model) for Broadvoice.