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Whitmarsh Posted:
Yes, boiler-plate
answers they
usually are,
though I did get
one sensible
answer
...

In The Forum:
Vonage UK
Topic:
Witholding Caller ID from display and the BT 1471 service
On Dec 17, 2014 at 09:58:00

revrob Posted:
I never heard from
them again. Seems
like boilerplate
answers only and
then that's
...

In The Forum:
Vonage UK
Topic:
Witholding Caller ID from display and the BT 1471 service
On Dec 11, 2014 at 15:43:28

dconnor Posted:
It all depends on
the wiring in your
house. Is it wired
for single line or
dual line?
...

In The Forum:
Hard Wiring - Installation
Topic:
Question on 2 Lines and Vonage (both Vonage)
On Dec 10, 2014 at 11:54:24

sashasuman Posted:
so that would mean
even if the number
is already with
another phone
provider i can
...

In The Forum:
Vonage Canada
Topic:
Control your account from your iPhone
On Dec 10, 2014 at 04:20:21

Pinfold Posted:
Simple question I
hope. I have a
1 line vonage
adapter, ordering
a 2 line one,
...

In The Forum:
Hard Wiring - Installation
Topic:
Question on 2 Lines and Vonage (both Vonage)
On Dec 09, 2014 at 18:19:52

Sxandy Posted:
so that would mean
even if the number
is already with
another phone
provider i can
...

In The Forum:
LNP – Local Number Portability
Topic:
Mitel 3300 CXi connections
On Dec 06, 2014 at 05:47:30

Whitmarsh Posted:
*30 is supposed to
block caller-id
for all subsequent
calls; if *67 does
it for
...

In The Forum:
Vonage UK
Topic:
Witholding Caller ID from display and the BT 1471 service
On Dec 01, 2014 at 06:30:00

revrob Posted:
Thanks for the
userguide info and
the new codes -
unfortunately the
result is the
...

In The Forum:
Vonage UK
Topic:
Witholding Caller ID from display and the BT 1471 service
On Dec 01, 2014 at 06:01:33

ILLLLM Posted:
I have a Cox
connection. Vonage
router is hooked
directly to cox
modem. Cox
Download
...

In The Forum:
Vonage
Topic:
Calls dropping every 5 to 10 seconds
On Nov 25, 2014 at 14:24:54

Sxandy Posted:
so that would mean
even if the number
is already with
another phone
provider i can
...

In The Forum:
LNP – Local Number Portability
Topic:
Mitel 3300 CXi connections
On Nov 12, 2014 at 06:04:12


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soulreaver
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Joined: Nov 02, 2008
Posts: 3

PostPosted: Sun Nov 02, 2008 3:29 pm    Post subject: Quality Problem - Delay Issues Reply with quote Back to top

I've had Vonage for several months now, and love everything about it expect for the quailty of calls. Specifically, I've been experiencing a slight "delay" when talking with others, whether they are on a cell phone or a land line. One person will be talking, and I'll say something while they're talking, but they won't hear it until a few seconds later and so will keep talking and eventually we both fall silent and have to take turns talking instead of having a fluid conversation. I was hoping this problem would be temporary or intermittent, but it has been happening on every call the whole time I've had service. I've talked with others who have Vonage and they do not have the same problem, so I'm hoping there is some way to fix it.

My info:
1. Location - Winter Haven, Florida
2. Your ISP name - Roadrunner cable
3. Upload - 7Mbps, download - 500Kbps
4. Modem - Toshiba PCX2500
5. Vonage adapter - VDV21-VD
6. Setup of Network - Modem-->Router-->Vonage Adapter
7. Issue you are experiencing - Delay
8. Run this Voip Test:

Speed test statistics
---------------------
Download speed: 6747664 bps
Upload speed: 492368 bps
Quality of service: 97 %
Download test type: socket
Upload test type: socket
Maximum download pause: 14 ms
Average download pause: 1 ms
Minimum round trip time to server: 41 ms
Average round trip time to server: 42 ms

Voip test statistics
--------------------
Jitter: you --> server: 1.0 ms
Jitter: server --> you: 3.5 ms
Packet loss: you --> server: 0.0 %
Packet loss: server --> you: 0.0 %
Packet discards: 0.0 %
Packets out of order: 0.0 %
Number of supported Voip lines: 8
Estimated MOS score: 4.0

Thanks in advance for any help you can give!
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VonTechMgr
Vonage Forum Evangelist
Vonage Forum Evangelist


Joined: Jan 02, 2008
Posts: 656
Location: NJ

PostPosted: Sun Nov 02, 2008 6:32 pm    Post subject: Reply with quote Back to top

In all the time you had Vonage, I bet you requested to swap out devices or it was suggested by Tech Support. But, have you ever changed out that modem of yours?

I am almost 100% sure it operates at 10Base-T half duplex.

After just finding the manual and looking at the specs, I am completely sure it is operating at half duplex. While half duplex is OK for TCP based internet traffic, it will not suffice for UDP protocol RTP(Real-Time Transport Protocol) packets which is what your audio stream is or any other bi-directional media for that matter.

Here is a good definition so you better understand the terminology of half duplex.

half-duplex - Refers to the transmission of data in just one direction at a time. For example, a walkie-talkie is a half-duplex device because only one party can talk at a time. In contrast, a telephone is a full-duplex device because both parties can talk simultaneously. Duplex modes often are used in reference to network data transmissions

You may also have an older hardware and software version modem which is only operation at DOCSIS 1.1 and needs to be at least 2.0 for optimum quality and bandwidth. It doesn't hurt to get an upgraded modem from your ISP which should also be able to increase your overall throughput. Just make sure the modem is a standalone bridged modem. This means a modem without a built in router or voice adapter.

Go to the end of the PCX2500 modem manual and look at the specs of the PC Interface. A good modem would need to be 10/100 half/full/auto sensing.

http://www.toshiba.com/taisnpd/products/pcx2500manual.pdf
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soulreaver
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New Forum Member


Joined: Nov 02, 2008
Posts: 3

PostPosted: Sun Nov 02, 2008 10:07 pm    Post subject: Reply with quote Back to top

Excellent information, I had no idea that my modem was half duplex! The problem makes more sense now. Smile I'll get my modem swapped out with a newer full duplex model and hopefully that will solve it!

Thanks so much for your quick and thorough response.
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