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Is Comcast blocking my VOIP?

I was successfully using my Voicestick voip to call out when I had AT&T dsl. However, now that I've switched to a wireless LAN using Comcast, I can't make my outbound calls with my Voicestick softphone. It gives me a code

12002 timeout error when I try to authenticate.

I've tried connecting with my software firewall to allow, and with it completely turned off. I tried port-forwarding the recommended Voicestick ports to my computer while my software firewall was off. I finally tried putting my computer in the router's DMZ with my software firewall turned off. I just couldn't get a call to go through. I can't think of anything that's stopping the show except Comcast. Could there be another reason? Thanks.

Reply to
M.L.
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Comcast and 3rd party VoIP works just fine. You almost certainly have your router and/or adapter (stick) configured incorrectly. Can you hook that "VoiceStick" directly to your cable modem [or is it a USB bit that connects to a PC}?

Reply to
Thomas T. Veldhouse

I'm not using the stick, just their softphone.

Reply to
M.L.

Firewall issue ... either on your computer or on your router ... I am about

100% sure of this. I am 100% sure that Comcast is not blocking VoIP. They took enough heat with their interference with torrents to even consider blocking VoIP for anti-competitive reasons.
Reply to
Thomas T. Veldhouse

Thanks for your reply. I had already tried shutting down my router and software firewalls with no success. Turns out that my WinXP Telephony service was set to Manual. After setting it to Started->Automatic and rebooting, I could make outgoing calls.

Reply to
M.L.

I believe VoIP does not work if you are using a private IP address (NAT) behind your router/firewall. It could also be a software issue with your router. Check with your router vendor for VoIP support and NAT.

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RP

Reply to
RP

Thanks for your reply. I found the problem was that the Telephony Service was not turned on on my system.

Reply to
M.L.

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