[Asterisk-Users] New TDM Revision in the wild: J

[Richard Scobie]

 >It looks like there is a PE-68624 chip near each RJ-45 connector
 >now.  Google says that it's a "frequency control filter"

Looking at the data sheet for this chip, it is being used as an EMI 
filter, (preventing RF interference generated on the card being radiated 
back out the cable).

It would also offer filtering the other way - attenuating incoming 
spikes and RF noise.

Regards,

Richard