The global tendency to replace legacy TDM-based switching equipment with state of the art IP-based technologies is most prominent in the telecommunications sector.
Migration towards NGN features like All-IP has been a major concern for operators who need to keep up with rapidly changing requirements regarding data processing infrastructure as well as customer demands.
Increasing maintenance costs for aged legacy equipment and diminishing availability of appropriately skilled workforce required for operations is one part of the challenge. Another revolves around hitting shareholders’ challenging OPEX cutting targets: A complete fast-paced PSTN switch-off appears attractive in order to eliminate associated OPEX and operate just one All-IP network instead of running two networks in parallel.
Ultimately there is no way around (fiber based) All-IP to cope with rapidly increasing bandwidth requirements fueled by both human and machine users in today's and tomorrow's 'always-on' and 'share everything' digital society.