The HP 3776B PCM Terminal test set is designed for Bell/Japanese/CCITT compatible networks. It has Bell extended superframe(ESF) and B8ZS line coding capability. Used in installation, commissioning and maintenance, the 3776B ensures optimum performance for each section (e.g., PCM channel bank, digital switching system or transmultiplexer) of the network. The HP 3776B provides comprehensive voice, PCM and data measurements for testing 4 kHz bandwidth analog and digital channels.