Donald Lee Andruska

ACD skill-based routing

Controll of call features provided to a subscriber by a hierarchical telecommunication switch

Method for identifying the originating network at the terminating network for transnetwork calls

Hierarchical switch support of services for subscribers directly served by local exchange carriers

Interswitch telephone status monitoring

System allowing telephone customers to send and retrieve electronic mail messages using only conventional telephonic devices

Common treatment of calls from subscribers served by different types of telecommunication equipment

Hierarchical switch support of services for subscribers of independent private branch exchanges

Call screening at a hierarchical switch based on organizational membership of the parties

Hierarchical switch support of services for subscribers of separate centrex exchanges