The invention provides a module for use in a central service provider interface having access to security system and voice and data communications. The module is configured to allow the security system to seize the telephone line when necessary to indicate a security breached to the service provider by incorporating RJ31 functionality to allow the security panel to seize the primary line if activated. The module is also configured to connect a modem to an Internet service provider over PSTN twisted pair cable. Primary and secondary telephone lines are passed through the modem before the telephones to allow filtering of the data signals.