Hi two weeks ago I posted a message concerning static noise on our asterisk system we have made a bunch of tests and these are the results We use a TDM card revision I and on the card there is a sticker that says revision G If we put one fxo modules there is no noise if we put two fxo modules there is no noise if we put three fxo modules on the lines 1-2-3, we have noise on line 1 (Zap/1). line 2 and 3 have no noise if we put three fxo modules on the lines 2-3-4 we have no noise if we put 4 fxo modules we have noise on the line 1 if we use an older TDM card, revision E/F, there is no noise problem. Digium has no explanation for now and have asked for a RMA of one of the cards. I will keep you informed. If someone else has seen this behaviour, tell me if there is an explanation. Patrick