I bought the Linksys SPA-3102 recently and I'm very satisfied with it. I
only have a few but quite annoying 'problems' with it. This thread
addresses the first one.
When I call somebody using the VoIP provider, the voice quality is very
clear. However, when I'm called by somebody else, the voice quality is
very poor (a lot of noise on the line and the other side seems to be
very far away).
Any suggestions to deal with this?
TIA,
Sinna
---
Hallo iedereen,
I heb onlangs een Linksys SPA-3102 gekocht en ben er zeer tevreden over.
Ik heb er echter een paar maar behoorlijk vervelende problemen mee. Deze
draad behandelt de eerste.
Wanneer ik iemand opbel via VoIP, dan is de spraakkwaliteit zeer helder.
Als ik echter door iemand opgebeld wordt, dan is de kwaliteit zeer zwak
(veel ruis op de lijn en de andere kant lijkt heel ver weg te zitten).
After serious thinking Sinna wrote :
> (For Dutch: see below)
>
> Hi all,
>
> I bought the Linksys SPA-3102 recently and I'm very satisfied with it. I only
> have a few but quite annoying 'problems' with it. This thread addresses the
> first one.
>
> When I call somebody using the VoIP provider, the voice quality is very
> clear. However, when I'm called by somebody else, the voice quality is very
> poor (a lot of noise on the line and the other side seems to be very far
> away).
>
Is this problem when someone calls your VoIP number or PSTN number?
Jono wrote:
> After serious thinking Sinna wrote :
>> (For Dutch: see below)
>>
>> Hi all,
>>
>> I bought the Linksys SPA-3102 recently and I'm very satisfied with it.
>> I only have a few but quite annoying 'problems' with it. This thread
>> addresses the first one.
>>
>> When I call somebody using the VoIP provider, the voice quality is
>> very clear. However, when I'm called by somebody else, the voice
>> quality is very poor (a lot of noise on the line and the other side
>> seems to be very far away).
>>
>
> Is this problem when someone calls your VoIP number or PSTN number?
>
>
I don't have a VoIP-in number (yet?). It's when I'm called on the PSTN
number.
Sinna formulated on Thursday :
> Jono wrote:
>> After serious thinking Sinna wrote :
>>> (For Dutch: see below)
>>>
>>> Hi all,
>>>
>>> I bought the Linksys SPA-3102 recently and I'm very satisfied with it. I
>>> only have a few but quite annoying 'problems' with it. This thread
>>> addresses the first one.
>>>
>>> When I call somebody using the VoIP provider, the voice quality is very
>>> clear. However, when I'm called by somebody else, the voice quality is
>>> very poor (a lot of noise on the line and the other side seems to be very
>>> far away).
>>>
>>
>> Is this problem when someone calls your VoIP number or PSTN number?
>>
>>
> I don't have a VoIP-in number (yet?). It's when I'm called on the PSTN
> number.
>
Right. You don't say where in the world the SPA is connected to a PSTN
line. Is it in the Netherlands?
What's the quality like on inbound PSTN calls? Presumably the same.
How did you set up your device? The forum at Voxilla is worth a look.
This post /may/ be useful (I only had a glance at it, though)
<http://forum.voxilla.com/linksys-sipura-voip-support-forum/impedance-regional-settings-netherlands-kpn-pstn-14318.html>
Also, have a look at the localization wizard
<http://voxilla.com/tools/device-configuration-wizard/linksys-spa-localization-wizard-802.html>
Jono wrote:
> Sinna formulated on Thursday :
>> Jono wrote:
>>> After serious thinking Sinna wrote :
>>>> (For Dutch: see below)
>>>>
>>>> Hi all,
>>>>
>>>> I bought the Linksys SPA-3102 recently and I'm very satisfied with
>>>> it. I only have a few but quite annoying 'problems' with it. This
>>>> thread addresses the first one.
>>>>
>>>> When I call somebody using the VoIP provider, the voice quality is
>>>> very clear. However, when I'm called by somebody else, the voice
>>>> quality is very poor (a lot of noise on the line and the other side
>>>> seems to be very far away).
>>>>
>>>
>>> Is this problem when someone calls your VoIP number or PSTN number?
>>>
>>>
>> I don't have a VoIP-in number (yet?). It's when I'm called on the PSTN
>> number.
>>
>
> Right. You don't say where in the world the SPA is connected to a PSTN
> line. Is it in the Netherlands?
>
No, it's in Belgium, but I also posted this message on a native Dutch
group so I understand the possible confusion.
> What's the quality like on inbound PSTN calls? Presumably the same.
I don't get you here I suppose? Do you mean if there's a difference
between the quality with or without the gateway in between?
>
> How did you set up your device? The forum at Voxilla is worth a look.
>
> This post /may/ be useful (I only had a glance at it, though)
> <http://forum.voxilla.com/linksys-sipura-voip-support-forum/impedance-regional-settings-netherlands-kpn-pstn-14318.html>
>
This looks promising but I can't try it out for the moment. I'll have a
look at it this weekend (hopefully).
>
> Also, have a look at the localization wizard
> <http://voxilla.com/tools/device-configuration-wizard/linksys-spa-localization-wizard-802.html>
>
Also something to keep in mind for the weekend.
>> What's the quality like on inbound PSTN calls?
>> Presumably the same.
> I don't get you here I suppose? Do you mean if there's a difference
> between the quality with or without the gateway in between?
There is actually a *slight* degradation of quality of a PSTN-call with the
SPA-3000 or SPA-3102 inbetween. This is because you actually go through the
SPA's DACs and the ADCs and the necessary filters. When making a PSTN call,
the SPA actually works as an FXO to FXS gateway, it does that digitally, not
analogue. The only way the SPA passes trough the analog line as it is, is
when you power it off. This degradation of quality is not huge, but
noticable. I noticed it... but not enough to start looking for help in a
newsgroup, so maybe another thing goes wrong with Sinna's SPA?
Christian - die effe geen zin had om 't in 2 talen te doen :-)
On Fri, 7 Sep 2007 20:56:18 +0200, "Christian"
<myfirstnamehere.2007@xs4all.nl.invalid> wrote:
>There is actually a *slight* degradation of quality of a PSTN-call with the
>SPA-3000 or SPA-3102 inbetween. This is because you actually go through the
>SPA's DACs and the ADCs and the necessary filters. When making a PSTN call,
The issue I always had was one of low volume when making or receiving
calls via PSTN. No matter how many gain adjustments I made, as
suggested on here or in various dedicated forums, I was never totally
happy with the levels compared to VOIP to VOIP calls. I guess the
above post answers the reasons why it can never be quite the same.
I don't have the device anymore but never got the settings 'quite
right' despite weeks of playing.
Ed Straker wrote:
> On Fri, 7 Sep 2007 20:56:18 +0200, "Christian"
> <myfirstnamehere.2007@xs4all.nl.invalid> wrote:
>
>> There is actually a *slight* degradation of quality of a PSTN-call with the
>> SPA-3000 or SPA-3102 inbetween. This is because you actually go through the
>> SPA's DACs and the ADCs and the necessary filters. When making a PSTN call,
>
> The issue I always had was one of low volume when making or receiving
> calls via PSTN. No matter how many gain adjustments I made, as
> suggested on here or in various dedicated forums, I was never totally
> happy with the levels compared to VOIP to VOIP calls. I guess the
> above post answers the reasons why it can never be quite the same.
>
> I don't have the device anymore but never got the settings 'quite
> right' despite weeks of playing.
>
>
> Ed.
>
Oh oh...
I've been playing yesterday evening, without success.
If you present here the 'final' result...
Perhaps I'll have to contact Linksys/Cisco directly.
Sinna wrote:
> (For Dutch: see below)
>
> Hi all,
>
> I bought the Linksys SPA-3102 recently and I'm very satisfied with it. I
> only have a few but quite annoying 'problems' with it. This thread
> addresses the first one.
>
> When I call somebody using the VoIP provider, the voice quality is very
> clear. However, when I'm called by somebody else, the voice quality is
> very poor (a lot of noise on the line and the other side seems to be
> very far away).
>
> Any suggestions to deal with this?
>
> TIA,
> Sinna
>
> ---
>
> Hallo iedereen,
>
> I heb onlangs een Linksys SPA-3102 gekocht en ben er zeer tevreden over.
> Ik heb er echter een paar maar behoorlijk vervelende problemen mee. Deze
> draad behandelt de eerste.
>
> Wanneer ik iemand opbel via VoIP, dan is de spraakkwaliteit zeer helder.
> Als ik echter door iemand opgebeld wordt, dan is de kwaliteit zeer zwak
> (veel ruis op de lijn en de andere kant lijkt heel ver weg te zitten).
>
> Iemand suggesties hoe ik dat kan oplossen?
>
> Alvast bedankt,
> Sinna
Hi all,
I *think* I solved it. Tested today and now I can hear the other side
loud and clear. Sometimes they complain about losing signal but AFAIK
that's caused by the VoIP provider.
What I have done as I'm living in Belgium: I've changed the FXS and FXO
Port Impedance to 270/750||150nF. This seems to solve the voice quality
problem.
--
Hallo iedereen,
Ik *denk* dat ik het probleem opgelost heb. Vandaag getest en nu kan ik
de ander kan luid en duidelijk horen. Soms klagen ze wel van wegvallend
signaal maar voor zover ik weet wordt dat veroorzaakt door de
VoIP-aanbieder.
Wat ik gedaan heb als inwoner van België: Ik heb de FXS en FXO Port
Impedances gewijzigd van 600 naar 270/750||150nF. Dat lijkt het probleem
met de spraakkwaliteit op te lossen.
Q: Voice Quality Linksys SPA-3102 
Linear Mode
