[asterisk-users] TDM400 with FXS some handsets not ringing

Brent Davidson brent at texascountrytitle.com
Wed Nov 5 18:13:54 CST 2008

There is going to be a bit of a current output limit on the FXS card.  
For the actual limit you will need to contact the manufacturer.  Phones 
that use digital ringers will be much more likely to work than phones 
that use mechanical ringers.

Mike wrote:
> Folks,
> I have a TDM400 with an FXS module.  I'm having some trouble ringing
> some phones attached to the device.
> I have a real el cheapo handset that cost me about 9UKP.  It works fine,
> I plug it into the Wildcard and call the channel and it rings.
> I have tried plugging in my BT Diverse 3016 cordless phone but it will
> not ring, although I can call out from it.
> I have also tried my GPO 332L (a rotary dial phone from the 1950's),
> this also does not ring however, I can pick up the phone and make a
> connection.
> Are there any limitations to the ringer on the FXS module?  Is there
> anything I can do to make my other phones ring?
> Thanks,
> Mike.
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