NICAM (Near Instantaneous Companded Audio Multiplex) - (Associated with NICAM Packet Transmission, NICAM Carrier Power, Near-instantaneous Companding, Point-to-point Links, ±0v has three binary representations, Parity checking limited to only 6 of 10 bits, PDH National and International Telecommunications Networks, NICAM-728, NICAM's STL Link Capability.)  http://en.wikipedia.org/wiki/NICAM