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Pacific Security Network News ]
Comparison of advantages and disadvantages between analog intercom system and digital intercom system
Simulation: The basic functions of the analog video intercom system are as follows: video intercom, security alarm, call management center, remote unlocking, information release, etc.
Digital: In addition to visual intercom, security alarm, call management center, remote unlocking, information release and other functions, the digital video intercom system also has the following features: video call between residents; recording of visitor video images and Storage; video playback; digital photo album; background music playback; lighting and home appliance control; network video monitoring.
　　
Interface docking comparison
Simulation: The analog bus-based building intercom system is often self-routed and becomes an independent network system. Due to the lack of standards in the industry, system integration is difficult, products between different manufacturers cannot be interconnected, and video intercom systems are difficult to interconnect with other weak electronic systems.
Digital: The digital intercom system adopts the TCP/IP method to borrow the residential broadband network. Multiple weak electronic systems can share the same broadband network. The cost of setting up the network is low. The standard interface is adopted. After the standard specification, the subsystems can be well integrated. Integration, improve the practicability of the equipment, and achieve the unity of the management platform of the community.
Video transmission comparison
Simulation: Analog intercom is used in cell video networking, but when the distance exceeds 1KM, the image quality cannot be guaranteed.
Digital: Digital video intercom is based on TCP/IP network protocol. Data is shared in the network. The most advanced algorithms and decoding techniques are used for video compression and extraction. Even at a long distance, the image quality is still clear.
Communication quality comparison
Simulation: Analog intercom is a bus system, which is a half-duplex communication method. When one of the door machines calls the management center, other wall machines or sub-management cannot be cleared.
Digital: Digital building intercom system, because it is connected to a broadband network, the center has a switch, and its communication is a full-duplex communication mode, so that multi-channel real-time data exchange is not only simple and fast, but also effectively avoided. Busy.
Installation and commissioning comparison
Simulation: There are many networked devices in the analog intercom system, such as network switchers, interlayer isolators, signal amplifiers, etc., any one equipment will increase the amount of debugging work, and such intermediate equipment can only be provided by the manufacturer. Confused to the manufacturer.
Digital: The digital intercom system adopts the standard TCP/IP protocol, which saves many intermediate devices such as switchers and selectors of the intercom system, reduces system complexity and facilitates debugging. For the local area network of the TCP/IP intercom system, routers, switches, etc. are common products on the market, and the configuration is easy to replace.
System maintenance comparison
Simulation: The traditional analog intercom system must be set up on a device-by-house basis. If a fault occurs, it can only be passively waiting for the user to repair it. The system upgrade requires a professional to replace the chip on site.
Digital: The debugging of the digital video intercom system is very convenient. The setting and testing of each device can be completed through the background software. When the device fails, the fault information can be automatically sent to the management center only, and the management center software can know at any time. The operation of the device; for the system upgrade, the terminal device can be automatically upgraded online without manual intervention, which is very convenient.
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