Call admission control method and communication system to...
Call and circuit state machine for a transaction control...
Call authorization and billing message routing capability
Call billing and measurement methods for redirected calls
Call center management system
Call charge control and notification
Call charge management device in private branch exchange system
Call charge transferring method in PBX system
Call charging method and related network elements
Call charging method in radio telephone system and radio telepho
Call charging method in radio telephone system and radio telepho
Call charging notification
Call control strategy for high capacity telecommunication servic
Call conversion process for a business system for a global telec
Call data collection and modification of received call distribut
Call detail record for internet call waiting
Call detail record for internet call waiting
Call distribution
Call distribution processing method for called line number compu
Call handling method for credit and fraud management