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Vonage I would agree with you on the bandwidth issue if the Vonage device is between the
I would agree with you on the bandwidth issue if the Vonage device is between the modem and router as it will prioritize a great portion of your overall bandwidth when a phone call is Active.
On the other hand, I feel you may not fully understand the DMZ. Yes this does place a single LAN IP outside of the firewall and makes this IP appear to not be NAT'd but it has no risk at all to your network. Think of it as not having the Vonage device at all. As long as ICMP is disabled on your routers WAN port, you feel a sense of security since someone running an IP / Port scanner will not see a live host. Well, the same thing goes for the Vonage adapter. By default ICMP is disabled on the WAN port so by placing this outside the DMZ, it is just as invisible to the internet as your router. It will not respond to ICMP so an IP scanner will not see it. The only thing that will be visible is UDP port 10000 which is not different then if it were behind the router without the DMZ.
The reason I say it's your hardware, and I don't just mean "YOUR" hardware. In general, the basic user who has audio issues does not understand that Voip functionality and quality is highly dependent upon their own hardware, bandwidth, priority of said bandwidth, the quality on the ISP node, the amount of traffic on the ISP node, path between Voip adapter and Voip service provider's media servers.
Now in your case, in order to even receive audio, the first RTP packet of the audio session has to come from your device. The Vonage media relay will not send any RTP packets to you until it has received the first packet from you on the correct source IP and port that is found in the SDP of the initial SIP Invite. With that said, your issue of no outbound audio on outbound calls indicates that the issue is at your firewall since we know that at least 1 RTP packet gets from your Vonage adapter to the media relay. If it did not, you would have no audio at all. It also tells us that it is not a BGP routing issue of some sort because again, you have inbound audio which means at least 1 RTP packet has made it to the Vonage media relay.
So just to be clear, I was not indicating your hardware is shotty in anyway. Just stating the root cause of your audio issue is definitely the firewall. And to your point, other users don't have better or worse. It's the same all around. So when people read how bad Vonage service is, they don't take the chance to fully understand how Voip works and where the majority of problems are. They just come to find that it is not their 130 year old copper analog telephone service where you just plug a phone into the wall and like magic, it work perfectly. Most negativity comes from those who just will not understand because they don't want to and are not willing to take the time to. It is just easier to bash Vonage and go back to the old phone service provider then try to find a solution.
Read The Full Thread: Port triggering vs forwarding
• Tech support suggested I disable my firewall to stop the frequent one-way calls
• About 90% of all audio issues related to VoIP is the customer's own firewall / NAT
• Well, that's far more straightforward than what I've been getting from TS. I'm
• There is, perhaps, a fourth option to consider: Change routers.
I've had
• So it has no effect when the phone is not in use?
OK, I've defined a fixed
• I did change routers. I don't think it had any effect. Hard to tell, though, since
• You may see a small decrease in bandwidth when the phone is not in use but when you
• There is, perhaps, a fourth option to consider: Change routers.
I've had
VonTechMgr posted "I would agree with you on the bandwidth issue if the Vonage device is between the" on 06/27/2009 |
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