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

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