Method and system for implementing service triggered by off-hook

A method for implementing a service triggered by off-hook, the method comprising:

• sending, by an Application Server (AS), a SUBSCRIBE message of a Session Initiation Protocol (SIP) signaling to a service implementing server, wherein the SUBSCRIBE message carries information of a service triggered by off-hook, which is subscribed to by a user on the AS, to a service implementing server;
• and
• carrying out, by the service implementing server, an operation of the service triggered by off-hook according to the information of the service triggered by off-hook when the user is off-hook, wherein said carrying out the operation of the service triggered by off-hook comprises:
• determining, by the service implementing server, that the user who has subscribed to the service triggered by off-hook is an MG user or an SIP user, according to user configuration data stored by the service implementing server, including user type information after receiving the SUBSCRIBE message of the SIP signaling;
• if the user is a Media Gateway (MG) user, recording, by the service implementing server, the information of the service triggered by off-hook carried in the SUBSCRIBER message in its own internal data;
• and
• if the user is an SIP user, transparently transmitting, by the service implementing server, the information of the service triggered by off-hook carried in the SUBSCRIBER message to an SIP terminal, so that the SIP terminal records the information of the service triggered by off-hook.