An elevator intercom system is a critical emergency

An elevator intercom system is a critical emergency communication solution for buildings, residential communities, commercial complexes, hospitals, hotels, campuses, and transportation facilities. When passengers are trapped in an elevator or need urgent assistance, the system provides a direct voice channel between the elevator car, machine room, elevator top, pit area, property control room, security center, or cloud service center. Traditional elevator intercom systems are often based on two-wire or four-wire analog communication. They can meet basic emergency calling requirements, but they are limited in audio quality, remote management, video linkage, system integration, and centralized operation. A SIP-based elevator intercom solution upgrades the original analog elevator communication system into an IP network platform while keeping the existing elevator intercom wiring and devices as much as possible. For modern smart buildings and smart communities, elevator intercom should not work as an isolated emergency phone. It should be integrated with IP PBX, SIP communication platforms, video surveillance, public address, access control, fire alarm, parking intercom, emergency help points, and visual dispatch systems. This creates a unified communication and safety management platform for daily service, emergency response, and long-term operation.