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Home > Archive > Voice Over IP in UK > October 2006 > Port Usage
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| Enigma 2006-10-10, 1:11 pm |
| Hi
I live in Cyprus and have broadband with satellite.
Using Skype is not very good. There is latency
I have spoken to our service provider and enquired about using Tesco
Internet Phone. He says if I find out what ports Tesco Internet uses he will
prioritise the ports.
Does anyone know which ones it uses?
Are these the same ports as used by other SIP phones?
Many thanks
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| cybuerke 2006-10-10, 1:11 pm |
| Enigma wrote:
> Hi
>
> I live in Cyprus and have broadband with satellite.
>
> Using Skype is not very good. There is latency
>
> I have spoken to our service provider and enquired about using Tesco
> Internet Phone. He says if I find out what ports Tesco Internet uses
> he will prioritise the ports.
>
> Does anyone know which ones it uses?
>
> Are these the same ports as used by other SIP phones?
>
> Many thanks
It's not looking likely -
Excerpt from:
http://www.tesco.com/tescotalk/about.asp
" and the (slightly) negative bit...
a.. You’ll have to pay BT for your line rental as you will still be using
their line.
b.. Tesco home phone only works on a BT line so if you’re on cable, sorry we
can’t help you.
c.. Mobile tariffs are constantly changing and are different depending on
which network you call. So to keep it simple we constantly track call charges
and make sure we charge you the lowest price we can.
d.. You’ll get charged a bit more for calls abroad but not a lot – only 4p per
minute to any of our 15 most popular countries.
e.. You can’t use your free minutes when dialling-up to connect to the
internet.
* Callback not available in all areas "
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"cybuerke" <cybuerke@PLMgooglemail.com> wrote in message
news:eggkng$sn5$1@news.freedom2surf.net...
>
> It's not looking likely -
>
> Excerpt from:
>
> http://www.tesco.com/tescotalk/about.asp
>
> " and the (slightly) negative bit...
> a.. You'll have to pay BT for your line rental as you will still be using
> their line.
> b.. Tesco home phone only works on a BT line so if you're on cable, sorry
> we can't help you.
Eh? Works perfectly well on cable.
I can imagine "Tesco Internet" not working, or some form of CPS or Indirect
Access for call charges not working. However, the OP was asking about Tesco
Internet Phone.
So, in answer to the OP's question, I'm sure that their service is IAX
based. The standard port for IAX2 is 4569
http://www.voip-info.org/wiki-IAX
| |
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| On 2006-10-10, Enigma <dd@ff.com> wrote:
> Hi
>
> I live in Cyprus and have broadband with satellite.
>
> Using Skype is not very good. There is latency
>
> I have spoken to our service provider and enquired about using Tesco
> Internet Phone. He says if I find out what ports Tesco Internet uses he will
> prioritise the ports.
>
> Does anyone know which ones it uses?
The Tesco service uses the IAX protocol which does both signalling and
audio on a single UDP port, 4569.
> Are these the same ports as used by other SIP phones?
No. SIP uses multiple ports. 5060 (generally) for signalling and a range
of other ports, which can be specified by some clients, for audio.
> Many thanks
A search with 'IAX' and 'Tesco' will pick up previous posts of interest
to you made in this newsgroup.
Brian.
| |
| Darren J Longhorn 2006-10-10, 7:11 pm |
| On Tue, 10 Oct 2006 20:01:26 +0300, "Enigma" <dd@ff.com> wrote:
>Hi
>
>I live in Cyprus and have broadband with satellite.
>
>Using Skype is not very good. There is latency
>
>I have spoken to our service provider and enquired about using Tesco
>Internet Phone. He says if I find out what ports Tesco Internet uses he will
>prioritise the ports.
If your broadband is via satellite, your always going to have at least
~ 240 mS of latency due to the distance of the satellite from the
earth, regardless of using Skype, Tesco or anybody.
| |
|
| On Tue, 10 Oct 2006 18:20:46 +0100, "cybuerke"
<cybuerke@PLMgooglemail.com> wrote:
>Enigma wrote:
>
>It's not looking likely -
>
>Excerpt from:
>
>http://www.tesco.com/tescotalk/about.asp
>
>" and the (slightly) negative bit...
> a.. You’ll have to pay BT for your line rental as you will still be using
>their line.
> b.. Tesco home phone only works on a BT line so if you’re on cable, sorry we
>can’t help you.
> c.. Mobile tariffs are constantly changing and are different depending on
>which network you call. So to keep it simple we constantly track call charges
>and make sure we charge you the lowest price we can.
> d.. You’ll get charged a bit more for calls abroad but not a lot – only 4p per
>minute to any of our 15 most popular countries.
> e.. You can’t use your free minutes when dialling-up to connect to the
>internet.
>* Callback not available in all areas "
>
You are thinking of Tesco Home Phone which is a CPS service over a BT
line.. the OP was enquiring about Tesco *Internet* Phone which is an
entirely different service.
| |
|
| Darren J Longhorn wrote:
>
> If your broadband is via satellite, your always going to have at least
> ~ 240 mS of latency due to the distance of the satellite from the
> earth, regardless of using Skype, Tesco or anybody.
http://herm.doylem.co.uk/~tim/speedOfLight.pdf
for the maths.
Tim
| |
| Darren J Longhorn 2006-10-11, 1:11 am |
| On Wed, 11 Oct 2006 00:20:04 +0100, Tim <nutnews@kooky.org> wrote:
>Darren J Longhorn wrote:
>
>
>
>
>http://herm.doylem.co.uk/~tim/speedOfLight.pdf
>
>for the maths.
Wouldn't the ground station to satellite distance be 35,786km?
Assuming a geostationary orbit and a receiver on the equator at sea
level? 
| |
| Desk Rabbit 2006-10-11, 7:11 am |
| Darren J Longhorn wrote:
> On Tue, 10 Oct 2006 20:01:26 +0300, "Enigma" <dd@ff.com> wrote:
>
>
>
>
> If your broadband is via satellite, your always going to have at least
> ~ 240 mS of latency due to the distance of the satellite from the
> earth, regardless of using Skype, Tesco or anybody.
>
>
Wouldn't we get latency when Internet traffic is routed normally through
satellites and packets get re-routed? I mean, a call from the UK to
Australia is a) very far & b) probably going to pass through a satellite
somewhere so VOIP shouldn't work at all.
| |
|
| Desk Rabbit wrote:
> Wouldn't we get latency when Internet traffic is routed normally through
> satellites and packets get re-routed? I mean, a call from the UK to
> Australia is a) very far & b) probably going to pass through a satellite
> somewhere so VOIP shouldn't work at all.
Most links go on fibre now. Still a long way, but a lot nearer than
into the sky and back.
Latency doesn't actually matter. The call will still work, just with a
delay.
It is jitter that stops most phones.
Tim
| |
|
| Darren J Longhorn wrote:
> Wouldn't the ground station to satellite distance be 35,786km?
>
> Assuming a geostationary orbit and a receiver on the equator at sea
> level?
You are correct
That number came from the Satellite company I was dealing at the time.
They told me 22500 KM. But that wouldn't be far off in miles.
Tim
| |
| Enigma 2006-10-11, 1:11 pm |
| Thanks guys, much appreciated.
Bearing in mind the points raised would people suggest the Tesco system one
perhaps one of the other service providers?
Thanks
"Enigma" <dd@ff.com> wrote in message
news:1160499690.11225.0@iris.uk.clara.net...
> Hi
>
> I live in Cyprus and have broadband with satellite.
>
> Using Skype is not very good. There is latency
>
> I have spoken to our service provider and enquired about using Tesco
> Internet Phone. He says if I find out what ports Tesco Internet uses he
> will prioritise the ports.
>
> Does anyone know which ones it uses?
>
> Are these the same ports as used by other SIP phones?
>
> Many thanks
>
>
| |
|
| On Wed, 11 Oct 2006 17:47:25 +0300, Enigma <dd@ff.com> wrote:
>Thanks guys, much appreciated.
>
>Bearing in mind the points raised would people suggest the Tesco system one
>perhaps one of the other service providers?
Judging from the information in this thread, IAX-based Tesco runs over one
well-defined port, whereas the SIP-based solutions could be on anything.
Thus, from a traffic prioritisation point of view, Tesco may well be the
better solution here.
[vbcol=seagreen]
>Thanks
>"Enigma" <dd@ff.com> wrote in message
>news:1160499690.11225.0@iris.uk.clara.net...
--
-- Michael "Soruk" McConnell
Eridani Star System
MailStripper - http://www.MailStripper.eu/ - SMTP spam filter
Mail Me Anywhere - http://www.MailMeAnywhere.com/ - Mobile email
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"Soruk" <soruk@bitbucket.eridani.co.uk> wrote in message
news:slrneirq9h.pfe.soruk@zeskia.int.eridani.co.uk...
> On Wed, 11 Oct 2006 17:47:25 +0300, Enigma <dd@ff.com> wrote:
>
> Judging from the information in this thread, IAX-based Tesco runs over one
> well-defined port, whereas the SIP-based solutions could be on anything.
> Thus, from a traffic prioritisation point of view, Tesco may well be the
> better solution here.
_Or_ /any/ *IAX* based service.
I think voiptalk can provide IAX trunks for asterisk
| |
| section.xiv@ntlworld.com 2006-10-12, 1:11 pm |
| Hi,
I've used VoIP over a satellite link, with www.callunion.com, but had
to use a softphone that had G729 codec, as some sat operators block
G711 codec as it uses about twice the bandwidth.
I have not found a free softphone that includes G729, but you can buy
X-Pro from www.xten.de for 25 Euro.
David
| |
| Gordon Henderson 2006-10-12, 1:11 pm |
| In article <1160657245.622633.31250@b28g2000cwb.googlegroups.com>,
<section.xiv@ntlworld.com> wrote:
>Hi,
>
>I've used VoIP over a satellite link, with www.callunion.com, but had
>to use a softphone that had G729 codec, as some sat operators block
>G711 codec as it uses about twice the bandwidth.
How can they block a particular codec? That would require a lot of sniffing
at the SIP setup or data transport packets - which might be a lot of effort
for little gain...
Did you try GSM?
>I have not found a free softphone that includes G729, but you can buy
>X-Pro from www.xten.de for 25 Euro.
Probably because you have to pay a license fee for the codec...
Gordon
| |
|
| On Thu, 12 Oct 2006 07:22:19 GMT, Jono <jono@NoThanksNeverBlueYonder.com> wrote:
>
>"Soruk" <soruk@bitbucket.eridani.co.uk> wrote in message
>news:slrneirq9h.pfe.soruk@zeskia.int.eridani.co.uk...
>
>_Or_ /any/ *IAX* based service.
True enough. I was limiting my reply to the scope of options listed
earlier in the thread, IIRC Tesco was the only IAX-based provider
mentioned.
>I think voiptalk can provide IAX trunks for asterisk
--
-- Michael "Soruk" McConnell
Eridani Star System
MailStripper - http://www.MailStripper.eu/ - SMTP spam filter
Mail Me Anywhere - http://www.MailMeAnywhere.com/ - Mobile email
| |
| Enigma 2006-10-14, 1:11 pm |
| Thanks everyone
"Soruk" <soruk@bitbucket.eridani.co.uk> wrote in message
news:slrneitb1l.pub.soruk@zeskia.int.eridani.co.uk...
> On Thu, 12 Oct 2006 07:22:19 GMT, Jono <jono@NoThanksNeverBlueYonder.com>
> wrote:
>
> True enough. I was limiting my reply to the scope of options listed
> earlier in the thread, IIRC Tesco was the only IAX-based provider
> mentioned.
>
>
> --
> -- Michael "Soruk" McConnell
> Eridani Star System
>
> MailStripper - http://www.MailStripper.eu/ - SMTP spam filter
> Mail Me Anywhere - http://www.MailMeAnywhere.com/ - Mobile email
>
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