The Sizheng IP network intercom system adopts leading IP intercom technology to transmit audio signals in the form of data packets over local area networks and wide area networks. It is a pure digital transmission hands-free intercom system.

●The Sizheng IP network intercom system can effectively solve the problems of limited transmission distance and susceptibility to interference in traditional intercom systems.

●The system structure is simple and integrates both public broadcasting system and visual intercom system. The built-in IO control and open RS485 protocol can seamlessly integrate with users' existing video surveillance systems, access control, LED display systems, and building systems. And achieve centralized operation of all devices and shared device resources. This greatly facilitates users' need for centralized control of various system devices in system integration projects.

●The application fields of the system involve industries such as steel, electricity, petrochemicals, rail transit, prisons, and finance, especially designed for workplaces with extremely high requirements for communication functionality and reliability, which are often noisy and high-risk work areas.

●Based on this, Sizheng provides intercom terminals designed according to different requirements: indoor environment, ordinary outdoor environment, harsh industrial environment, and specific environment, meeting the combination needs of customers and ensuring that all content can be clearly conveyed during calls.

The main features of the system are:
●The sound quality is clear and smooth, not affected by external electromagnetic waves, occupying a minimum bandwidth of only 16kbps, and the call delay within the local area network is ≤ 30 milliseconds;
●Supports 720P bidirectional video calls, H.264 and H.263 video encoding, and can achieve 24-hour video recording integration with mainstream manufacturers' NVRs;
●The transmission distance is infinitely extended, which can continue to unify the management of distributed deployed terminals (or subsystems) and achieve remote management;
●All terminal devices adopt hardware echo cancellation technology, which has strong echo cancellation ability and noise suppression. Full dual video and voice calls, multi-party visual conferences, and zone (whole area) broadcasting functions can be easily achieved;
●Dedicated audio encoding format, encryption processing, to prevent eavesdropping and enhance the security of system calls;
●Easy to adjust and expand, adding terminals in areas where the network can cover can complete system expansion;
●The system can seamlessly integrate with users' existing video surveillance systems, LED display systems, access control systems, building systems, etc;
●The system adopts a multi-user level management mechanism, which can deploy multiple management hosts and regional hosts simultaneously. Both management hosts and regional hosts can run independently, and the damage of one host will not affect the operation of the entire system. The management system adopts an embedded structure to prevent virus intrusion and increase the stability of system operation;