A key requirement of a fiber optic communication system is its ability to transmit data from one location to another relatively free of errors in the data stream. The graphic advertisement has a time passage indicator for indicating the passage of time. The piston ring is rotatably fitted into the ring groove. By using only a single m-bit tail, the hybrid interleaver improves bit error rate. In one preferred embodiment, the collet member comprises a plurality of fingers having a gap between each individual finger.