Voice Over IP in UK - SPA3102 PSTN quality

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Author SPA3102 PSTN quality
Oldie

2006-09-28, 7:11 am

I've been toying with the idea of combining my PSTN & VOIP lines
through one ATA, but I seem to remember reading that some users had low
volume on PSTN calls on the SPA3000. Can anyone who has used the
SPA3102 tell me whether it suffers from this problem or not?

Oldie

Paul

2006-09-28, 7:11 am

Oldie wrote:
> I've been toying with the idea of combining my PSTN & VOIP lines
> through one ATA, but I seem to remember reading that some users had low
> volume on PSTN calls on the SPA3000. Can anyone who has used the
> SPA3102 tell me whether it suffers from this problem or not?
>
> Oldie
>


Changing the FXS impedance to the UK spec of "370+620||310nF" and
altering the VoIP-PSTN gateway/PSTN-VoIP gateway gain levels should be
able to solve that. It's a balancing act between getting the volume
high enough without introducing echo on some or all calls. The same
applies to most VoIP equipment connected to analogue lines although in
some cases with the more expensive VoIP cards you get built-in echo
cancellers.

cheers,
Paul.
Oldie

2006-09-28, 7:11 pm

Paul wrote:

(snipped)

> Changing the FXS impedance to the UK spec of "370+620||310nF" and
> altering the VoIP-PSTN gateway/PSTN-VoIP gateway gain levels should be
> able to solve that. It's a balancing act between getting the volume
> high enough without introducing echo on some or all calls. The same
> applies to most VoIP equipment connected to analogue lines although in
> some cases with the more expensive VoIP cards you get built-in echo
> cancellers.


So if I understand you correctly this will apply equally to the 3000
and the 3102? Since I already have a router with QOS the built-in
router in the 3102 is superfluous to my requirements. Will I then be
just as well off technically (and better off financially) in buying a
3000?

Oldie

Paul

2006-09-29, 7:11 am

Oldie wrote:
> Paul wrote:
>
> (snipped)
>
>
> So if I understand you correctly this will apply equally to the 3000
> and the 3102? Since I already have a router with QOS the built-in
> router in the 3102 is superfluous to my requirements. Will I then be
> just as well off technically (and better off financially) in buying a
> 3000?
>
> Oldie
>


Yes that applies to both the 3000 and the 3102. You might as well just
buy a 3102 even if you don't need the router functionality as they
should be the same price.

cheers,
Paul.
Oldie

2006-09-29, 7:11 am

Paul wrote:

(snipped)

> Yes that applies to both the 3000 and the 3102. You might as well just
> buy a 3102 even if you don't need the router functionality as they
> should be the same price.
>
> cheers,
> Paul.


Thanks Paul. Please excuse my ignorance, but how do I disable the
router? Do I just connect the LAN port to my switch (as my current SPA
1001 is) and ignore the WAN port completely?

Alternatively if I replace my existing router will the connections be:

ADSL filter ->SPA 3102 ->switch ->LAN ?

Can't seem to get my head round this one, and I haven't found a simple
schematic for it anywhere. A confusing factor (to me anyway) is that
the Linksys documentation uses the terms "Ethernet port" and "Internet
port", which I presume equate to LAN and WAN ports respectively.

Oldie

Jono

2006-09-29, 1:11 pm

Oldie explained :
> Paul wrote:
>
> (snipped)
>
>
> Thanks Paul. Please excuse my ignorance, but how do I disable the
> router? Do I just connect the LAN port to my switch (as my current SPA
> 1001 is) and ignore the WAN port completely?


More or less. I can't remember if the WAN port is plugged into your
router's LAN port & the SPA's LAN port is ignored......or the other way
around.

> Alternatively if I replace my existing router will the connections be:
>
> ADSL filter ->SPA 3102 ->switch ->LAN ?


No, it doesn't have an ADSL modem in, so it would have to be

ADSL filter -> ADSL Modem with ethernet out ->SPA 3102 ->switch ->LAN


Anna Langley

2006-09-29, 1:11 pm

Jono wrote:

> Oldie explained :
>
> More or less. I can't remember if the WAN port is plugged into your
> router's LAN port & the SPA's LAN port is ignored......or the other way
> around.


Plug the ethernet cable into the one marked "Internet" and you're there.

Anna

Oldie

2006-09-30, 7:11 am

Anna Langley wrote:
> Jono wrote:
>
>
> Plug the ethernet cable into the one marked "Internet" and you're there.
>
> Anna


Thanks all!

Oldie

Paul

2006-10-02, 7:11 am

Oldie wrote:
> Anna Langley wrote:
>
> Thanks all!
>
> Oldie
>


Yes plug the WAN/Internet port into your existing router and just ignore
the LAN/Ethernet port on the SPA-3102. No need to actually disable
anything, just ignore it.

The only problem is you'll have to temporarily plug a PC into the
LAN/Ethernet port to be able to access the web interface to configure
the SPA-3102 as you can't access it using the WAN port by default. Once
you are in there is a setting to enable configuration using the WAN port.

cheers,
Paul.
Oldie

2006-10-03, 1:11 pm

I think I'm almost ready to order, but a thought has just struck me.
Can you only make outgoing calls through VoIP or can you specify PSTN
as one of your outgoing providers?

I have a specific requirement for a particular destination to be called
via my PSTN line (probably through the Orchid dialler which will sit
between the 3102 and the line). If it needs an access code, I can
specify this in the short code dialling of the telephone set.

Oldie

Jono

2006-10-03, 1:11 pm

Oldie wrote :
> I think I'm almost ready to order, but a thought has just struck me.
> Can you only make outgoing calls through VoIP or can you specify PSTN
> as one of your outgoing providers?


You can, yes. Even to the point of saying only a particular number
should be dialled over the PSTN (or VoIP)

> I have a specific requirement for a particular destination to be called
> via my PSTN line (probably through the Orchid dialler which will sit
> between the 3102 and the line). If it needs an access code, I can
> specify this in the short code dialling of the telephone set.
>


If you're going to use a proviedr such as voip.co.uk, you could
actually choose to present your PSTN number on your VoIP line.


Ivor Jones

2006-10-03, 1:11 pm



"Oldie" <realoldie@googlemail.com> wrote in message
news:1159895971.577416.149240@i42g2000cwa.googlegroups.com
> I think I'm almost ready to order, but a thought has just
> struck me. Can you only make outgoing calls through VoIP
> or can you specify PSTN as one of your outgoing providers?
>
> I have a specific requirement for a particular
> destination to be called via my PSTN line (probably
> through the Orchid dialler which will sit between the
> 3102 and the line). If it needs an access code, I can
> specify this in the short code dialling of the telephone
> set.
>
> Oldie


The AVM Fritz!Box range can do this; either a prefix (for example 0870) or
a particular number can be made to route via any specified account or the
PSTN line.


Ivor


Ian Pawson

2006-10-03, 7:11 pm

Oldie wrote:
> I think I'm almost ready to order, but a thought has just struck me.
> Can you only make outgoing calls through VoIP or can you specify PSTN
> as one of your outgoing providers?
>
> I have a specific requirement for a particular destination to be called
> via my PSTN line (probably through the Orchid dialler which will sit
> between the 3102 and the line). If it needs an access code, I can
> specify this in the short code dialling of the telephone set.
>
> Oldie
>

Yes, send the number to gateway 0 (gw0) just add it to your dila plan
Oldie

2006-10-04, 7:11 am

Jono wrote:
> Oldie wrote :
>
> You can, yes. Even to the point of saying only a particular number
> should be dialled over the PSTN (or VoIP)


Thanks for your help (and to everyone else - again!)

>
> If you're going to use a proviedr such as voip.co.uk, you could
> actually choose to present your PSTN number on your VoIP line.


Yes, I already do this on Voipfone.

Oldie

Oldie

2006-10-07, 1:11 pm

Paul wrote:

(snipped)

> Changing the FXS impedance to the UK spec of "370+620||310nF" and
> altering the VoIP-PSTN gateway/PSTN-VoIP gateway gain levels should be
> able to solve that. It's a balancing act between getting the volume
> high enough without introducing echo on some or all calls. The same
> applies to most VoIP equipment connected to analogue lines although in
> some cases with the more expensive VoIP cards you get built-in echo
> cancellers.


Well, I took the plunge and bought one. Having got lots of good advice
from you good folks I was up and running quickly. So far so good; I
have all my providers set up and working and the PSTN line rings.
However, I get no CLI (or CID as Linksys call it) on incoming PSTN
calls. I have googled a bit and found that some people have had a
similar problem, while for others it seems to be OK.

That leads me to believe that it must be doable, so does anybody have
any idea of the settings that I need to change to achieve this? (I have
already changed the Caller ID Method under the Regional Tab
(Miscellaneous) to "ETSI FSK With PR(UK)" and the VOIP CID works fine).

Oldie

Oldie

2006-10-10, 1:11 pm

Oldie wrote:

(snipped)

> Well, I took the plunge and bought one. Having got lots of good advice
> from you good folks I was up and running quickly. So far so good; I
> have all my providers set up and working and the PSTN line rings.
> However, I get no CLI (or CID as Linksys call it) on incoming PSTN
> calls. I have googled a bit and found that some people have had a
> similar problem, while for others it seems to be OK.
>
> That leads me to believe that it must be doable, so does anybody have
> any idea of the settings that I need to change to achieve this? (I have
> already changed the Caller ID Method under the Regional Tab
> (Miscellaneous) to "ETSI FSK With PR(UK)" and the VOIP CID works fine).


More bad netiquette in replying to my own posts, but I managed to solve
the CLI problem. All I had to do was to upgrade to version 3.2.10,
available from the Linksys site, and it worked straight away. I thought
I'd post this follow-up in case anyone else in the UK facing the same
problem googles for it.

Oldie

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