The Voice Mail system provides the voice mail service based on the existing network. When a call is transferred to the VM system, the system asks the calling party to leave a message for the called party when the called party is busy, powered off, or out of the service area. It provides voice mail, call prompt, and voice short message and email. By adopting VM service, operators' system put-through rate, service usage rate, customer satisfaction, and revenue can be improved.
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