Access method of network terminals, access system and gateway

A gateway equipment, comprising:

• a gateway multimedia service processing module having at least a processor, configured to receive an access request to a service network system initiated by a second network terminal, and provide an access proxy to the service network system for the second network terminal by the use of subscriber certification information configured on a first network terminal;
• wherein the first network terminal and the second network terminal are connected to the gateway equipment, and the second network terminal is not configured with the subscriber certification information;
• wherein the gateway multimedia service processing module further comprises:
• a service request processing module, configured to receive a service request to the service network system initiated by the second network terminal that needs to obtain service provided by the service network system and has accessed the service network system;
• a service capability determining module, configured to determine whether a service capability of the accessed subscriber initiating the service request meets service capability requirements of the service request;
• wherein if yes, the service request processing module sends the service request to the service network system;
• otherwise, the service request processing module sends a re-registration request to the network terminal initiating the service request;
• a subscriber selecting module, configured to perform registration for a subscriber meeting the service capability requirements according to the service capability requirements in the re-registration request and the subscriber certification information configured on the first network terminal after receiving the re-registration request initiated by the second network terminal.