intercom service वाक्य

उदाहरण वाक्य

1. "Even if your private telephone keeps working, you're probably not going to have intercom service to the desk or the vestibule,"
2. The telephones may still be used to make and receive calls when the central office is available, but the system is unable to provide visual or audible supervision, as well as hold functions and intercom services during power outages.