Corporate telecommunication network signalling issues

The ETSI Strategic Review Committee on Corporate Telecommunication Networks (ETSI SCR5) defined a corporate telecommunication network as consisting of `sets of equipment (customer premises equipment (CPE)) and/or customer premises networks (CTNs) which are located at geographically dispersed locations and are interconnected to provide networking services to a defined group of users´. This definition describes the equipment making up a CTN. But the expectation is that the network architecture and the provision of services serve the specific needs of the specific corporation. These needs vary from corporation to corporation and evolve in time in response to internal and external forces. The most important trends are identified, terminal signalling issues are considered and the signalling issues for metropolitan and wide area networks are discussed. CTNs have to interwork with public networks and have to make use of other networks for interconnections. The issues here are also considered