Method and communication system for implementing calling tapping at flash

A method for implementing Calling Tapping at Flash, comprising the following steps of:

• when there is a new voice message for a user, actively initiating a Session Initiation Protocol (SIP) message which carries the description information of the new voice message by a Voice Mail Application Server;
• sending the SIP message to a user terminal or a home network device of the user terminal, and notifying the user by the user terminal or the home network device;
• wherein when the user is a terminal user in a Packet Service (PS) domain, said notifying the user comprises the following steps of:
• triggering the SIP message to a supplementary service control unit by a call session control unit in the PS domain;
• determining the prompt means of Calling Tapping at Flash of the user by the supplementary service control unit;
• when the prompt means is “display on telephone interface”, transmitting the SIP message to an SIP user agent node by the supplementary service control unit, parsing the SIP message and sending a prompt message by the SIP user agent node to the user terminal;
• and
• when the prompt means is “go off hook to listen for cue tone”, recording the description information of the voice message in the SIP message in accordance with the presubscribed off-hook signal event by the supplementary service control unit;
• playing the cue tone for the voice message when the user goes off the hook.