bit transparency
Bit transparency is when the communication protocol is neutral with respect to the data to be transmitted. Bit-transparent facilities accept arbitrary bit patterns, which are all treated equally.
Bit transparency is also referred to as bit sequence independence. Lack of bit transparency can occur when a transmission method does not transmit state changes when transmitting from an uninterrupted"zero" or a continuous one, such as Alternate Mark Inversion( AMI) or Return to Zero Code( RZ).