asterisk users - Aug 2005 - TDM400 and Phone does not 'ring'

I have a running * with a TDM40B board in it.
I have 3 analog phones that works (rings) perfectly when connected
to a Telco POTS line.
When connected to the Digium TDM40B (with FXS port), I have problems
with 'ringing':
1 phone 'ringes' normally
1 phone 'ringes' a bit cripled (instead of ring-ring... ring-ring..., it
  does  'ring-ri... ri.... ring... ri...)
and the 3rd one does not ring at all when Asterisk says 'Ringing Zap/6'.
However, when I do an 'off-hook' on this phone, I get tone signal and
can dial and talk perfectly.

I have phones compliant to the Belgium (Belgacom) Telco specs.
Are there differences in 'Ring Voltage' ?

Anyone with a suggestion ?

Thanks
Alex

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Hi Alex,

Sounds very much like the FXS card is unable to drive enough power to ping more 
than 1-2 phones. I am also assuming you have the external power connected to the
PCI card.

In the UK the phone specification must be able to do this with 4 parallel phones
at an average acoustic sound pressure level from each.

I am still trying to get my FXS card working, but as soon as I do, I will make 
some checks to see how it performs.

Thanks


Alex Ongena wrote:
> I have a running * with a TDM40B board in it.
> I have 3 analog phones that works (rings) perfectly when connected
> to a Telco POTS line.
> When connected to the Digium TDM40B (with FXS port), I have problems
> with 'ringing':
> 1 phone 'ringes' normally
> 1 phone 'ringes' a bit cripled (instead of ring-ring...
ring-ring..., it
>   does  'ring-ri... ri.... ring... ri...)
> and the 3rd one does not ring at all when Asterisk says 'Ringing
Zap/6'.
> However, when I do an 'off-hook' on this phone, I get tone signal
and
> can dial and talk perfectly.
> 
> I have phones compliant to the Belgium (Belgacom) Telco specs.
> Are there differences in 'Ring Voltage' ?
> 
> Anyone with a suggestion ?
> 
> Thanks
> Alex
> 
> --
> NEW: aXs GUARD hands-on Trainings v.7.0 
> more info at http://www.axsguard.com/indextraining.htm
> 
> aXs GUARD has completed security and anti-virus checks on this e-mail
> (http://www.axsguard.com)
> ---------------------------------------------------
> Able NV: ond.nr 0457.938.087
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-- 
Gary

> 1 phone 'ringes' a bit cripled (instead of ring-ring...
ring-ring..., it
>   does  'ring-ri... ri.... ring... ri...)
> and the 3rd one does not ring at all when Asterisk says 'Ringing
Zap/6'.
> However, when I do an 'off-hook' on this phone, I get tone signal
and
> can dial and talk perfectly.
> 
> I have phones compliant to the Belgium (Belgacom) Telco specs.
> Are there differences in 'Ring Voltage' ?
There is an issue here in France with our Siemens DECT phones that
required a patch to change the ring _frequency_. It was given here
ages ago, but now I can't find it. I believe it is still in
"bugs". It
requires a change to one line in wcfxs.c