Ok, makes sense. I obviously have one of the newer TDM400P cards since it does have the power connector. However, I only plan on using FXO ports. Will the card work without external power if there are only FXO ports?
Thanks
Old TDM400P cards did not have a power connector. The new ones do. The power to the card is required on any card that has a power connector. The modern TDM400P cards are the only Digium cards that require external power (since they are the only cards that support analog FXS ports and those ports require more power than many motherboards can provide via the PCI bus)
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In a word: yes. FXO ports do *not* need the external power.
Michael Swan
Neon Software, Inc.
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