At 09:57 PM 6/27/2006, you wrote: >2 TDM400P's with 4 FXO modules each = 8 FXO's = 8 PSTN lines. >It's like John said. >Very simple maths one would of thought, unless I'm completely off the mark. >In which case I do apologise. Probably better off with the TDM2400, 2 fxo boards and the echo can. Ira