An optional input board that hAndles 16 time code (LTC) signals. As the IXS-6700 can accept up to eight IKS-TC6010 boards, the number of inputs can be expAnded from 16 to 128, in units of 16. As the IXS-6600 can accept up to four IKS-TC6010 boards, the number of inputs can be expAnded from 16 to 64, in units of 16.