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

In The Forum:
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
...

In The Forum:
Vonage
Topic:
Voicemail Not Forwarding to Outlook Accounts
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
...

In The Forum:
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:
Vonage
Topic:
Looking for a ringer ameliorate
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:
How to arrive at wifi password?
On Oct 20, 2016 at 05:05:49

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

In The Forum:
Hard Wiring - Installation
Topic:
How to have Vonage and another land line?
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:
Vonage
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:
Vonage
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,
...

In The Forum:
Hard Wiring - Installation
Topic:
W52p Setup
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
...

In The Forum:
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Topic:
A good sip trunking provider
On Jul 17, 2016 at 23:42:46


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TerryM
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PostPosted: Mon Sep 19, 2005 5:16 pm    Post subject: Reply with quote Back to top

I hate to jump in late and confuse this issue but there is one other factor that could be affecting your outbound call quality. There can be a problem on sufficiently slow outbound links where a relatively small Voip packet has to wait for a larger data packet to be sent on the outbound link even when qos is enabled. This is the case when a high priority voice packet arrives to the scheduler after the larger data packet has started transmission. This can result in increased latency for that packet and larger jitter on the voice flow. Some simple math can highlight this phenomenon. Say your outbound link is 256Kbps, your average voice packet is 200 bytes, and your average data packet is 1500 bytes (the default MTU on Windows XP for ethernet links). At 256Kbps your link can send 256000/8=32000 bytes per second. If you divide by 1000 you get 32 bytes per millisecond. A voice packet may have to wait for up to 1500/32=46.875 ms for a large outbound data packet to be sent. If your outbound link is slower the 256k in reality, it only worsens the problem.

There are three ways to fix this:

1 Send voice only without data on the link (unacceptable)

2 Buy really expensive routers at both ends of the link that are capable of fragementing large packets and interleaving small packets between them. (only works if you have lots of money you are willing to spend on this and own the routers at both ends of the link)

3 Change the MTU on the machines that are generating the data traffic. I would suggest setting it to 576 bytes as this is an old standard MTU from the early dial-up days. You need to check how this is done on whatever operating system you are running. This will result in slower upload speeds due to the increased overhead inherent in using more packets to send the same amount of data.

This is something else that is both simple and under your control that you can try. It may help, it may not. I have used it successfully on slower speed links in private networks in the past.

Terry
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joeldwolf
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Joined: Sep 01, 2005
Posts: 39

PostPosted: Mon Sep 19, 2005 8:29 pm    Post subject: Reply with quote Back to top

ok finally did the speed test 4 times.. upload was a consisitant 236 download 2840-2854.. of couse I can figure the 90%, but just checking to see what you suggest...
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joeldwolf
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Posts: 39

PostPosted: Mon Sep 19, 2005 8:31 pm    Post subject: Reply with quote Back to top

2870 on my last dl test ....
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polarisdb
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Joined: Jul 22, 2005
Posts: 177

PostPosted: Mon Sep 19, 2005 8:53 pm    Post subject: Reply with quote Back to top

I would start with something like 215/2600 and you can always tweak from there...

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joeldwolf
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Posts: 39

PostPosted: Mon Sep 19, 2005 9:57 pm    Post subject: Reply with quote Back to top

which directions would I tweak
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polarisdb
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Posts: 177

PostPosted: Tue Sep 20, 2005 6:49 am    Post subject: Reply with quote Back to top

I would set Uplink to ~215 kbps and Dnlink to ~2600 kbps.

Then I would try a quick bittorrent test like you have been running. If your voice quality is good during this test, then you know that the Uplink value is set low enough and you can leave Uplink alone if you are satisfied with the performance. If you want to try to raise the Uplink ceiling, try raising it in increments of ~ 5 kbps while rerunning your bittorrent test each time.

Basically the rule of thumb is if your voice quality is bad during these tests, try lowering Uplink. If voice quality is good during these tests, you can leave it alone or can try raising Uplink and re-testing.

If you want to be a little more precise, you can try tuning with the "ping method" outlined in HowTo: Vonage and QoS with Sveasoft Alchemy Firmware.

You Dnlink value will most likely work fine as is. If you want to try to test and tweak Dnlink, you can try the "ping method" linked to above while downloading one or more large file from the internet (like Windows XP Service Pack 2).

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