PDH technology

PDH technology (Plesiochronous Digital Hierarchy) is based on pulse code modulation (PCM). In pulse code modulation a multiple-shift usage of a transmission link is enabled by TDM (time division multiplexing).

PDH technology enables with its hierarchical structures the implementation of networks with transmission capacities of up to 140 Mbit/s. In applications with cross connecting on bit-level or with a demand of special interfaces, PDH system technology is in use even today.

Company «NVP Ukravtomatika» creates effective solutions, based on checked up production of the company SIAE Microelettronica, the leader on manufacture of the radiorelay equipment in Europe. Application of modern solutions of broadband wireless access gives an opportunity to make process of expansion of an infrastructure of "last mile" fast, simple and inexpensive.

For PDH technology company SIAE Microelettronica has created the line of products of AccessLink Family, EasyLink Family and EasyLink full outdoor Family.

Special efforts have been dedicated to the ODU design in order to increase commonalities among the possible configurations/modulations and to reduce spare part management through extended Software tuning range. AL Family ODU Transceiver supports 4, 16 and 32 QAM modulation schemes, 2 to 105 Mbit/s capacity and any IDU version (compact, standard, fully-protected).