TY - GEN AU - Ronayne,John TI - Introduction to digital communications switching SN - 0-273-02178-8 U1 - 621.382,RON PY - 1986/// CY - London PB - Pitman KW - Telecommunication engineering N1 - Introduction to communications switching (Page-3), Introduction to communication transmission (Page-20), Pulse code modulation (Page-29), Error sources and prevention (Page-50), Digital exchanges and switching(page 70)6.digital exchanges and control (Page-99), The digital network (Page-128), Digital frontiers (Page-165), System review and the next generation (Page-182) ER -