Abstract: A telephone service interface (TSI) for accessing a network connection from the subscriber side of a network interface device. A TSI modular plug is adapted to mate with the security monitoring system jack. The TSI jack is connected to a TSI modular plug via first and second conductors. The first conductor establishes a first circuit between contact 1 on the TSI modular plug and contact 1 on the TSI jack and wherein the second conductor establishes a second circuit between contact 8 on the TSI modular plug and contact 8 on the TSI jack. First and second leads are connected to contact 4 and contact 5 of the TSI jack. The TSI jack receives the security monitoring system connection plug from the security monitoring system. The security monitoring system is connected to the telephone service provider network NID via contacts 4 and 5 of the security monitoring system connection plug.

Abstract: A telephone service interface (TSI) for accessing a network connection from the subscriber side of a network interface device. A TSI modular plug is adapted to mate with the security monitoring system jack. The TSI jack is connected to a TSI modular plug via first and second conductors. The first conductor establishes a first circuit between contact 1 on the TSI modular plug and contact 1 on the TSI jack and wherein the second conductor establishes a second circuit between contact 8 on the TSI modular plug and contact 8 on the TSI jack. First and second leads are connected to contact 4 and contact 5 of the TSI jack. The TSI jack receives the security monitoring system connection plug from the security monitoring system. The security monitoring system is connected to the telephone service provider network NID via contacts 4 and 5 of the security monitoring system connection plug.