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tplink Posted:
Im trying to add
my HT802 vonage
adapter to my home
network. I
currently have
...

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Hard Wiring - Installation
Topic:
Vonage behind switch
On Dec 05, 2016 at 06:35:11

DWSupport Posted:
After recent
Vonage update that
took place on the
4th and 5th of
Nov. E-mails with
...

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On Nov 10, 2016 at 12:23:26

peterlee Posted:
Had a call from a
Hospital in Ajax,
Ontario to my home
in
Scarborough, Onta
rio
...

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Vonage Canada
Topic:
Hospital Incoming call unable to connect
On Nov 08, 2016 at 11:59:50

TELLDOUG Posted:
I am looking for a
product that will
make my phone ring
louder so I can
hear using
...

In The Forum:
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Topic:
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On Oct 26, 2016 at 09:21:30

HildBeft Posted:
You can recollect
password by
connecting the
router to your pc
and open the
browser
...

In The Forum:
Hard Wiring - Installation
Topic:
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On Oct 20, 2016 at 05:05:49

HildBeft Posted:
Great tips..
Thanks for sharing
...

In The Forum:
Hard Wiring - Installation
Topic:
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On Oct 20, 2016 at 04:55:03

massrman Posted:
The devices are
available at
different price
margins , please
share your
estimated
...

In The Forum:
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Topic:
IP PBX for small business
On Sep 30, 2016 at 00:48:03

massrman Posted:
Hi these are most
commonly used SIP
PBX interops and
their
configuration
guides,
...

In The Forum:
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Topic:
IP PBX for small business
On Sep 30, 2016 at 00:37:45

Sammy00 Posted:
Has anyone setup a
W52p phone for
vonage? I have
a W52p with two
wireless handsets,
...

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Topic:
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On Aug 30, 2016 at 10:38:01

James44 Posted:
Hi, I am
looking for a good
Sip Trunking
provider in
Canada. they
should offer
...

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On Jul 17, 2016 at 23:42:46


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arungupta
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Joined: Oct 22, 2003
Posts: 4

PostPosted: Fri Mar 05, 2004 7:51 pm    Post subject: Vonage Sound Quality Reply with quote Back to top

I have now been using Vonage for 4 months now - but I have never achieved satisfactory sound quality. Specifically, these are the problems I have faced:

- In domestic calls, it seems that about one third of my calls have poor quality, to the extent that the other party mentions that the connection is bad.

- In International calls, the percetage is much higher, vast majority of the calls are poor quality.

- I do a number of conference calls from home - and there is some interference with conference call systems - the sound quality is horrible, so I cannot use it for conference calls.

I have a CableVision Optima Online internet service, which has worked very very well and has always delivered excellent bandwidth. The Vonage box is a Cisco ATA 186.

I've now pretty much stopped using Vonage, and I have been considering disconnecting it. But a web site asked me to write a review of Vonage, so I thought to write a fair review I should try to find out if I am doing anything wrong. I am asking to find out if my experience is unusual, or is there something I may be doing wrong.

Thanks for your help.

Arun Gupta
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ckoehncke
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Joined: Jan 31, 2004
Posts: 104

PostPosted: Fri Mar 05, 2004 8:03 pm    Post subject: Reply with quote Back to top

Vonage terminates both international and national long distance in the same manner, namely dumped to a normal PSTN ASAP -- so to some degree you may be imagining problems with international. Calls to spooky wooky countries (basically any country with a dictator) introduce an assortment of problems with any carrier as the call is often passed to numerous carriers before finally terminating.

What you are NOT imagining (no offense intended in any of these remarks BTW) is that people you are calling are hearing poor quality. My bet is you're hearing them just fine but they're saying they hear you poorly.

The problem is two fold, your upload speed may be compromised (typical if you're on a cable modem) and second the CODEC (software used to encode your voice into packets) in the MOT or Cisco box is basically crap.

Voip despite all the noise is a relative bandwidth hog. Like a passenger train - it must depart and arrive 100% on schedule for perfection to be achieved. Delays either in sending or receiving quickly result in poor voice quality.
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arungupta
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PostPosted: Fri Mar 05, 2004 10:54 pm    Post subject: Reply with quote Back to top

Thanks for the prompt and excellent response, ckoehncke.

I also have a regular SBC landline phone. So whenever I've had problems with Vonage, I've called back on my landline - invariable with excellent sound quality. So the quality problem is definitely not in the other country's phone system, it is definitely with my Vonage connection. The countries that I've tried with Vonage, all with sound problems, Japan, India and Italy.

For international calls, where does the dump to PSTN take place, in US or in the foreign country?

I just ran speedtest on my cable connection - download is 4 Mbps, upload is 150 Kbps. So I can see the problem with the upload. What is an acceptable upload speed for Vonage to function satisfactorily?

Thanks again.
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arungupta
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PostPosted: Fri Mar 05, 2004 11:01 pm    Post subject: Reply with quote Back to top

And I forgot to ask. If the CODEC in Cisco and Motorola boxes is crap, what do you recommend?
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gfoulks
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Posts: 243

PostPosted: Fri Mar 05, 2004 11:43 pm    Post subject: Reply with quote Back to top

I think maybe 150 up is a bit low. If you use the max setting for bandwidth it uses something like 90k.

Here are my speed tests and I can say with my connection I've never had a call that sounded bad. In fact my Vonage service is so clear it sounds like the person is in the next room.

*********** Testing Results ************

Upload Speed: 508 KiloBits/sec
Download Speed: 1637 KiloBits/sec
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LA
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Joined: Feb 12, 2004
Posts: 37

PostPosted: Sat Mar 06, 2004 6:44 am    Post subject: Reply with quote Back to top

My OptimumOnline connection gives me more than 900kb/sec up, so I've never had a voice quality issue. Vonage has been indistinguishable from a regular phone line. You might try setting Vonage to use a lower bandwidth, which you can do on the web site.

You may also have other internet problems such as packet loss. There are on-line test for that too.
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gblinckmann
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Joined: Feb 15, 2004
Posts: 10
Location: Albany, NY

PostPosted: Sat Mar 06, 2004 8:46 am    Post subject: Reply with quote Back to top

Try the speed test and see what results you get:

https://secure.vonage.com/vonage-subscribe/subscribe/test.do

*********** Testing Results ************

Upload Speed: 350 KiloBits/sec
Download Speed: 2288 KiloBits/sec

This connection qualifies for Vonage
hosted DigitalVoice service

===============

I've gotten excellent voice quality with these numbers.

I subscribe to Earthlink Cable on a Time-Warner Cable system.
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ckoehncke
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Joined: Jan 31, 2004
Posts: 104

PostPosted: Sat Mar 06, 2004 10:16 am    Post subject: Reply with quote Back to top

Ah ... you wish to enter the murky world of international call terminations do you Twisted Evil ?

Vonage sends your outbound calls to typically a Global Crossing gateway located in the U.S. The location of the gateway varies (I can't figure out exactly why for the moment).

Now Global Crossing (GC) has your phone call on their network and Vonage is basically done with the call. International calls operate like a "spot market" with rates changing daily if not hourly. Based upon your call destination, GC selects the cheapest partner of the day and sends your call along the way. The call may or may not continue in an IP format at that stage.

GC does monitor it's partners for quality circuits (basically looking for calls of short duration which they equate to people hanging up due to poor quality). So why is an AT&T Int'l call better. Simple -- because AT&T has a reputation to maintain AND more important does not want you calling to complain (as it cost a bunch of money for them to speak with you). Thus - AT&T closely monitors their termination partners and acts quickly to remove anyone who starts to cause trouble.

There are literally hundreds of termination companies in the world and managing these relationships is often complex and larger carriers have entire departments who do nothing more than work on these agreements. The objective being giving me the best service at the lowest price.

Now on to voice quality issues related to Voip

Many of posters have indicated they have just fine upload and download speeds as reported by a variety of speed testers. However, that's really not the problem.

The issue is two fold, latency and the CODEC.

As you speak the DSP takes your voice and chops it up into samples. Using the algo of the CODEC, the DSP (in your MOT or Cisco box) then basically does the equal to Winzip and encodes the voice sample and puts it into an IP packet. It then drops the IP packet over to the Ethernet Forwarding chip (also in your MOT/Cisco box).

The forwarder now try to send the upstream. Voip uses UDP meaning basically the forwarder dumps the voice packets into the Internet and simply hopes they reach the far end AND in the correct order

The FAR END (the gateway receiving the packets) knows that packets may actually be received out of order. Thus it has something called a 'jitter buffer'. Basically it introduce a slight delay in order to ensure it has all the packets. But what if a packet is delayed. As voice is 'real time' it can only wait so long thus after a pre-determined period of time, the FAR END has no choice but to un-ZIP the packets and turn it back into voice.

Missing packets mean missing voice samples and they result in the clipping, static or general poor voice quality you hear.

There are standards for CODEC development. But there is still an element of art in how a CODEC 'zips and 'unzips the packets. It's much improved from early Voip days but still could be improved further. As it's built into your box and the remote gateway, there is basically little you can do to improve. Time will help.
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arungupta
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Joined: Oct 22, 2003
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PostPosted: Sat Mar 06, 2004 12:39 pm    Post subject: Reply with quote Back to top

Thanks again folks for your help. I ran the speedtest provided on the Vonage site, and it gave me:

"Upload Speed: 135 KiloBits/sec
Download Speed: 3100 KiloBits/sec
This connection qualifies for Vonage
hosted DigitalVoice service"

I had set my bandwidth saver sound quality to 90 kbps, I just changed it 50 kbps. Would that improve sound quality or make it worse?

I have to also now diagnose why I am only getting 135 kbps upload on my cable modem, may be my networking gear.

ckoehncke, thanks for the illuminating response on international calls. So now I can see why international calls are hit and miss.

Considering Circuit city is now going to resell Vonage, I don't know if Vonage and Voip is ready yet for the average consumer.
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ckoehncke
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Joined: Jan 31, 2004
Posts: 104

PostPosted: Sat Mar 06, 2004 3:48 pm    Post subject: Reply with quote Back to top

Like wine, critics all over the map on what CODEC sounds best. Vonage currently supports 3 (G.711, G.726 and G.729). Each has decreasing bandwidth requirements. The higher bandwidth allows for more samples of your voice to be taken (and less of the CODEC trying to make up the difference).

The 'rub is that the high quality codec (G.711 for example) send much larger packets out thus if any of them are delayed or mis-routed -- voice quality suffers fast.

I've tried them all, but the MIDDLE range (like life in general) is where I've found the best compromise. This is G.726 whose bit rate is 32 kbps (vs 64 kps for G.711) and occupies a nominal 55.2 kbps when transmitting (IP overhead).
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