The cable is not making contact correctly on the pins of the Krone.
Either due to the incorrect cable being used or a warn out Krone block.
How we resolved this :
We had to double jumper another piece of cable right behind the first
jumpered cable. Tightening the connection between the Krone and the primary
recording cable leading to the LDA card.
SEE Recording on a Polycom: no recording or very soft