two meanings - Completion of Call to Busy Subscriber. Notify caller when called telephone becomes free and automate reconnection. One of a number of ways ensuring that a billable call happens as often as possible, increasing ARPU. Many of these are CF, call forwarding, techniques. Customer Care and Billing System. Computer system supporting both customer service representatives in a call centre and batch billing of postpay (as opposed to prepay) telephone subscribers. Interfaces to rating, mediation, Interconnect Billing and subscriber provisioning.
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