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+--- Thread: Comcast: multiple IPs? (/showthread.php?tid=86649)
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Re: Comcast: multiple IPs? - space-time - 10-26-2009
it is NOT a problem of BANDWIDTH. That is just fine.
I has some issues with routing the VOIP calls and the iChat calls correctly in the past. as soon as I connected the device directly to the net, the problems was solved, so it was 100% a NAT issues.
Re: Comcast: multiple IPs? - Doc - 10-26-2009
> as I connected the device directly to the net, the
> problems was solved, so it was 100% a NAT issues.
...Or you need a new router/firmware or you've got a cabling problem or any number of other things.
Re: Comcast: multiple IPs? - space-time - 10-26-2009
Doc wrote:
> as I connected the device directly to the net, the
> problems was solved, so it was 100% a NAT issues.
...Or you need a new router/firmware or you've got a cabling problem or any number of other things.
nope, these GIZMO VOIP ATA don't like to be behind a router which uses NAT. Also, there are numerous complains about iChat not working properly behind most routers. believe me, it's not a deal breaker, but if I could get 2-3 public IPs from comcast that would make things much simpler.
Re: Comcast: multiple IPs? - AllGold - 10-26-2009
space-time wrote:
nope, these GIZMO VOIP ATA don't like to be behind a router which uses NAT.
Since probably 90% of all broadband users use a router and NAT, I think I know where to point the finger.
Re: Comcast: multiple IPs? - space-time - 10-26-2009
AllGold wrote:
[quote=space-time]
nope, these GIZMO VOIP ATA don't like to be behind a router which uses NAT.
Since probably 90% of all broadband users use a router and NAT, I think I know where to point the finger.
and how many of those users use SIP Phone, AKA Gizmo 5, http://gizmo5.com/pc/ with an ATA adapter?
Re: Comcast: multiple IPs? - M A V I C - 10-26-2009
For the most part, all routers use NAT. Otherwise they're pretty much just a switch.
Have you tried putting your Gizmo on the DMZ?
Re: Comcast: multiple IPs? - space-time - 10-26-2009
M A V I C wrote:
For the most part, all routers use NAT. Otherwise they're pretty much just a switch.
Have you tried putting your Gizmo on the DMZ?
yes, I tried that with the old router; I had a DSL Model/Router combo from Verizon and it worked. Now I have compat cable, so I have a stand-alone modem, and I got a Buffalo router, and rather than setting up DMZ, I put the Gizmo first in line, then the router. So in fact I have 2 DHCP servers, one in the Gizmo, one in the real router. Maybe I should turn the DHCP server in the router off, and let the GIZMO to all the DHCP and routing stuff.
I have another VOIP box down the line, this is a paid VOIP line, and it worked fine for 2 years and now I miss calls sometimes. I think Packet8 is having some issues, since a friend of mine reports the same with his account. Still, I'd like to get a public IP for this box, to make sure it is not a NAT/Router issue. I am tempted to cancel the account and port the number to some other provider
Re: Comcast: multiple IPs? - M A V I C - 10-26-2009
space-time wrote:
Maybe I should turn the DHCP server in the router off, and let the GIZMO to all the DHCP and routing stuff.
Yeah, that might fix your VOIP issues. Otherwise you're double NAT'ed.