Hello Holger,

On Sat, 28 Feb 2009 12:55:04 +0100, "Holger Adams" holger@kernreaktor.org wrote:

OK, I think I know where the problem is - there must be a cableing problem with the Twinax connectors.

So there is my next question: Which pin of Y01 is TX+ and TX-? Which pin of Y02 is RX+ and RX-?

The polarity does not care, you can exchange TX+ with TX- and RX+ with RX-. A simple test for just the correct wire without connection the BS-11:

- On the cable which goes to Y01 you should be able to see a signal with an oscilloscop between TX+ and TX-.

- If you connect the two TX lines with the two RX lines (loopback, polarity does not care), the card should synchronise and the LEDs should not longer blink. Attention: I have tested this on Windows only, with a loopback, I can see that the card synchronises, however I don't know what mISDN does, but I guess it will also synchronise.

If this works, you know that the cable is OK.

Best regards, Dieter