asterisk users - Jan 2005 - Ring Voltage Supplied by Wildcard TDM400P REV E/F & AUTO FXS/DPO

Hi;

I'm trying to connect a TDM400P with an FXS module to a Valcom V-9940 
Paging adaptor. This port on the TDM400P was connected to a 2500 Set 
and was working I just re-connected it to the Valcom (which is known to 
work on a Telco POTS line) and its not picking up.  The Valcom docs say 
it need a minimum of 75 Volts at 20-30 Hz to recognize a call... So the 
question is what ring voltage does the FXS modules on a TDM400P put 
out?

Thanks;
Tim

asterisk-users-bounces@lists.digium.com wrote:
> Hi;
> 
> I'm trying to connect a TDM400P with an FXS module to a Valcom V-9940
> Paging adaptor. This port on the TDM400P was connected to a 2500 Set
> and was working I just re-connected it to the Valcom (which
> is known to
> work on a Telco POTS line) and its not picking up.  The
> Valcom docs say
> it need a minimum of 75 Volts at 20-30 Hz to recognize a
> call... So the
> question is what ring voltage does the FXS modules on a TDM400P put
> out? 
Ultimately, that depends on how much current is being drawn, but my
multimeter reports about 70V on a 6 foot line cord. Generally, I'd
expect an FXS to put out more like 90-110V (that's what my TalkSwitch
supplies).





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On Jan 11, 2005, at 1:16 PM, Wilson Pickett wrote:
>> Thank you to all who replied, I will be trying this out as soon as I
>> can down the system to reload the modules.
>
> There was also a fix to change the frequency in what was then wcfxs.c
> which is how I got our older phones to ring.
Thanks again to everyone who replied, the boostringer=1 in modules.conf 
seems to have solved my problems! But I did have to reboot the machine, 
not just reload the modules as I would have thought...

Later;
Tim