@chunlei.yi
this is not the answer to my question.
if i have 2 cards (D-110P and A400-P) and i want to use the timing cable. i think one card is clock master and the other is clock receiver.
1. what card must be master?
2. what jumpers need to close to be master?
3. what jumpers need to close to be receiver?
Best regards, Werner
PS: my problem is. if i use the cards without timing cable and there is a bridged call from D-110P to A-400P then loudness is very high and no communication is possible. so i think i need the timing cable.