[Asterisk-Users] Is it mandatory to give power supply to TDM400P card

[Eric Wieling aka ManxPower]

Lokesh kumar wrote:
> Hi,
> Everybody,
> I can modprobe TDM400P card without feeding power
> supply , so what is the purpose of providing power
> supply in that card.
> Can any body tell me

The power connector for the TDM400P is required to generate ring voltage 
on the FXS ports.  If you don't have and FXS modules on your card, then 
rumor has it that you do not need the power connector.

-- 
Eric Wieling * BTEL Consulting * 504-210-3699 x2120

r: Generate a ringing tone for the calling party, passing no audio from
the called channel(s) until one answers. Use with care and don't insert
this by default into all your dial statements as you are killing call
progress information for the user. Really, you almost certainly do not
want to use this. Asterisk will generate ring tones automatically where
it is appropriate to do so. "r" makes it go the next step and
additionally generate ring tones where it is probably not appropriate to
do so.