[asterisk-users] TDM400P (TDM22P) and aux power.

[Matthew Fredrickson]

Thomas Kenyon wrote:
> Joe Acquisto wrote:
>> I need to ask, to refresh, is the aux power connector on the TDM400P card *only* to power the ringer on any 
>> analog phones/devices on the system?  
>>
>> Can I still use this board, to "terminate" POTS lines and use all SIP Phones?
>>
> Yes, you only need to connect a power supply if you have FXS boards.
> 
>> Due to circumstances, I end up with a 1u server that has no aux power connectors available.  I "have to" use this server, so am considering abandoning the analog phones and using all SIP.
>>
>> IIRC, the aux power *is* only to power ringers.
>>
> I don't remember if it is also needed to provide the potential for the
> line as well, but I cat testify to the fact that you can comfortably run
> a TDM400P with 4 FXO boards on it and nothing plugged into the PSU header.

That is correct.  You *only* need the power connector plugged in for FXS 
modules.  FXO modules do not need them.

-- 
Matthew Fredrickson
Software/Firmware Engineer
Digium, Inc.