1. An arrangement for transmitting a broadband signal over a multiplexed pulse code modulated (PCM) transmission system having 8-bit time slots comprising: encoding means for transforming said broadband signal into PCM words of n-bits each, inserting means for inserting m of said n-bit words into p of said 8-bit time slots wherein m, n and p are integers and mn=8p characterized in that said arrangement further comprises bit order arranging means for arranging the bit order of said n-bit words so that the second bit positions of said p 8-bit time slots are occupied only by the p least significant bits of said n-bit words.