[asterisk-users] FXO clock

[Jeff LaCoursiere]

On Sat, 6 Jun 2009, Ayman Hendawy wrote:

> Dear sir
> I build a daughter card to interface the FXO module with blackfin537 stamp
> board, but unfortunately I can`t get Dial tone or any other signalling via
> fxo port.however the fxo module has been detected on the board.
> my daughter card work with clock= 2.048MHZ, and i configure asterisk with
> USA signalling.I suspect that the frequency of 2.048MHZ (form E1 TDM frame
> ) is not suitable for USA signalling as USA work with standard T1 TDM .
> am I right or not,are that could make a problem.
> Thanks for your help.
>

You need to integrate the FXS module if you want dial tone from it.  Are 
you trying to build a digital interface or analog?

j