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mikebrown Posted:
there, Please
check out -

In The Forum:
Hard Wiring - Installation
Hardwiring in a Rental House
On Oct 24, 2017 at 22:29:48

mikebrown Posted:
Hello, I think
you should consult
it with the Expert
they can surely
help you

In The Forum:
Hard Wiring - Installation
Hardwiring in a Rental House
On Jun 24, 2017 at 09:15:34

Haniltery Posted:
For wipe call
history also some
of the offline, in
gengral , it
usually apply to

In The Forum:
How to Delete call history from online account?
On May 09, 2017 at 06:14:26

diana87 Posted:
You have to use
VPN service to
and get free
access while

In The Forum:
Recent calling problem from Egypt
On May 02, 2017 at 17:28:06

dconnor Posted:
What is the main
number on the
account? And
which one is the
virtual number?

In The Forum:
Vonage UK
How do you call 999
On Apr 27, 2017 at 18:52:02

Trafford Posted:
Seems like a
question. We
rely exclusively
on a Vonage system
for our

In The Forum:
Vonage UK
How do you call 999
On Apr 27, 2017 at 10:42:50

diazou Posted:
Hello, It's
compatible with
Android your phone
? Thanks!

In The Forum:
IP PBX for small business
On Mar 28, 2017 at 12:42:33

jeddaisg Posted:
Hi all We have
a Vonage VOIP
system for our
office. Lately,
our call quality

In The Forum:
Ethernet Cable; Wiring schematic? 568-B?
On Feb 23, 2017 at 18:33:52

beast321 Posted:
I don't know if
you heard, that
many more
Dreamcast games
are opened up

In The Forum:
Fax - Tivo - Alarms
Using phone as a dial up modem for Dreamcast Gaming
On Feb 16, 2017 at 03:16:51

Av8rix Posted:
Sorry to start a
new thread on an
old topic but when
I google “Vonage
MAC address

In The Forum:
New adapter and router -- MAC change
On Jan 11, 2017 at 01:07:21

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Vonage Hi All, Thanks for your help. Following up from my earlier post in which I called

Hi All,

Thanks for your help. Following up from my earlier post in which I called for some conclusive data about the alleged blocking of Vonage by Comcast, we are still looking for a reliable testing solution that will provide some really bulletproof data.

I've enlisted the help of someone with more Tech expertise than myself to comment. Below is some of the stuff he sent over to me. Your feedback is much appreciated. I'm assuming some of you will be familiar with all of the stuff that my friend makes a point of explaining to me in layman's terms, if so, sorry about that, and please just skip to the end. He has specifically mentioned the potential of designing a test himself or enlisting people from Vonage to custom design a test. What do you think:

So there are several issues here:
* Comcast is assumed to be highly technical, so they will be able to
cleverly hide their sabotage, if it exists
* User testing tools are not generally sophisticated enough to detect

Lets take a look at the testing part first, because that will lead into
the explanation of the second part.

User testing tools largely consist of testing over a protocol called
ICMP. ICMP ( is a peer to the TCP
part of TCP/IP (it's also a peer protocol to UDP, not talked about

ICMP traffic is special traffic that isn't typically used as part of
everyday network usage. When you browse the Internet, or make a Voip phone call, you're using TCP, not ICMP. When you ping or traceroute ( the two most common tools on user systems ) you're using ICMP, not TCP.

ISPs will block ICMP traffic for many reasons, including security (more likely) or general bandwidth conservation (less likely).

A good way to see this is by pinging :
matt@matt:~$ ping
PING ( 56(84) bytes of data.

- ping statistics -
9 packets transmitted, 0 received, 100% packet loss, time 8001ms

In this case, you can see that all packets were "lost", in our case they were blocked. However, you can still (obviously) access Microsoft's websites using a web browser.

In any case, ICMP traffic can be selectively handled differently from
normal TCP traffic very easily. Because of this, it's difficult to have
users try and detect problems on their systems without specialized
tools. I'll talk about these more at the bottom of this email.

Having said all of this, the next logical step seems to be "Well, why
not just use a web browser, since that's normal traffic, to detect

(Un)fortunately, Comcast is an ISP and can do far more clever "futzing" with traffic than simple ICMP filter/blocking. Voip traffic uses a particular protocols and well-known ports that we can assume Comcast knows about. Given this, they can block/delay traffic to and from customers of Vonage selectively.

So, they can allow full speed traffic to and from Vonage's webservers and selectively block/delay Voip traffic only if they so choose.

It's important to keep in mind, however, that given the complexity
involved with delivering reliable network traffic that Comcast may
simply be having technical issues. This happens more often than people realize and may explain the reasons involved here.

Unfortunately, without a very specific set of tests (which I would
expect Vonage to create, actually) it will be hard to prove Comcast's
actions one way or the other.

Having said all of this, there are a few tools people can use to try and detect issues (should you want to learn how to do all of this of
course). On is a tool called "Nmap" ( ). Nmap is a "security" tool
and shouldn't be used lightly (system administrators don't like people using Nmap against their servers, as it's classically used by crackers gathering information before breaking into systems). However, you can use nmap to scan the remote hosts and see which ports are open. This would be a quick way to tell if the ports are being blocked intermittently.

Another tool is called Ethereal
( ). Ethereal can be used to
monitor network traffic at the very lowest levels and requires a
protocol expertise to interpret the data. However, it could be used in this case to figure out if the packets are being blocked/delayed because
there are markers in the way the packets are handled (packet loss for example).

Also, a link to a Vonage test:

Read The Full Thread:

Comcast vs. Vonage

I am no believer in conspiracies, but having seen two episodes of Vonage issues
Well, Comcast is doing their own VoIP service in some areas now.... considering
(As I shudder contemplating the impending buy out of my most excellent ISP by Comcast)... I
I know ISPs like to provide that "bandwidth hog" argument, but in reality, does
Well, you're right of course, it's a low use compared to those... except that it
I will call my local comcast now and ask if they offer voip.. as they did not in my
somethings is going on... Before when I called comcast I always got the same
hmmm. Mediacom, here in central Iowa, has recently started offering their flavor
Be careful with the Comcast "digital phone service". I had that for about 3.5 years
We are trying to get more info on this Comcast thing. If you are in the midwest, having

Joscelin posted "Hi All, Thanks for your help. Following up from my earlier post in which I called" on 03/02/2006

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