[Asterisk-Users] Ring Voltage Supplied by Wildcard TDM400P REV E/F& AUTO FXS/DPO

[Jim Van Meggelen]

asterisk-users-bounces at 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).





-- 
No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.300 / Virus Database: 265.6.10 - Release Date: 10/01/2005