Communications system ingress and egress arrangement

Communications system reconfigurable with reduced network config

Completing telecommunications calls in a competitive local and t

Connections between a toll network and multiple local networks

Connections between a toll network and multiple local networks

Dial restoral method for digital circuits

Distributed control of telecommunication network for setting up

Distributing calls over serving centers of a large customer

Dynamic routing-administration

Dynamically controlled routing of calls in intelligent networks

Dynamically controlled routing using virtual nodes

Electronic private branch exchange having an LCR function and a

Electronic private branch exchanges

Integrated network controller for a dynamic nonhierarchical rout

Intelligent call processing based upon complete identification o

Interexchange carrier automatic route selection system

Least cost router

Least cost routing method according to information transfer capa

Method and apparatus for automated node-based normalization afte

Method and apparatus for efficient call routing