The present document specifies network requirements:
NOTE 1: Network requirements to support connection of NGCN directly connected to an NGN are specified.
NOTE 2: Attachment of legacy PBX functionality to the NGN is not specified in the present document. It is
assumed that existing legacy service requirements apply in this case.
The present document also specifies network requirements for communication between NGCN capabilities (including
user equipment) to other NGCN capabilities of the same enterprise through the NGN (e.g. geographically separated).
The present document does not specify NGCN services, nor does it specify network based application services provided
to a user of an NGCN.