Sizing Trunk Bundles Which Can Be Seized at Both Ends with Different Grade of Service

In this paper, a technique is established and prepared tables are furnished for the sizing of trunk bundles which can be seized at both ends, but where different grade of service must be rendered at each end. An approximate approach is also discussed. These solutions find applications in the engineering of foreign exchange voice systems serving a customer base (low blocking) and interdepartmental communications (high blocking).