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The building voice intercom system has been in use for over two decades. Since 1992, international manufacturers of voice intercom systems have gradually entered the Chinese market. Today, there are nearly ten foreign brands available on the mainland, and a growing number of domestic brands have also emerged. Among them, Guangzhou Sizheng holds the highest market share for building intercom systems and employs experienced technical staff specializing in audio monitoring. The company has also developed access control intercom applications. However, despite its long history, the system still faces several challenges. What are the current shortcomings, and where is the industry heading? Let’s explore. First, the challenges facing access control intercom systems. Security against theft typically relies on three main strategies: civil defense, physical defense, and technical defense. Civil defense involves residents, property management, and security personnel; physical defense includes protective fences and secure doors; while technical defense encompasses access control intercom systems, closed-circuit television (CCTV) monitoring, and 24/7 surveillance. From the complaints of residents, it becomes clear that the primary issue with the intercom system lies in a combination of weak civil defense and inadequate technical protection. This is mainly due to low security awareness among residents, incomplete property management, and inherent flaws in the intercom system itself. (1) Lack of Safety Awareness Among Residents One major cause of security vulnerabilities in residential areas is the lack of safety awareness among homeowners. This is evident in two key areas. First, many residents do not understand how to properly use or maintain the access control system. Frequent incorrect operations and improper handling of access cards often lead to card demagnetization and system failure. Some individuals forget their access cards and compromise their own safety by using temporary access, which can damage the system. Second, there is a general lack of self-protection awareness. Many homeowners casually share access codes with relatives, friends, contractors, or service workers for convenience. Others may open the door for strangers without taking necessary precautions, making it easy for passwords to be stolen by outsiders. (2) Inadequate Property Management and Security Practices Another significant issue comes from poor management practices by property companies and security personnel. Many residents report that unauthorized individuals can easily enter and exit because of weak password policies. Additionally, some security guards fail to thoroughly check suspicious people who follow residents into the building. These lapses highlight the need for better oversight and training. While all security products have their limitations, it's crucial to address these issues through proper maintenance and management. If not handled correctly, even the best systems can become ineffective. Second, the four major limitations of access control intercom systems. (1) Compatibility and Standardization The concept of multi-system compatibility involves two aspects: the integration of different technologies within the same system and the integration of different systems and technologies. The first refers to the ability to combine various technologies within similar systems, allowing for flexible application across different community levels. For example, large-scale communities may include high-rises, low-rise buildings, and villas, each requiring different system configurations. The second aspect involves integrating different systems and technologies, such as video codecs, cabling standards, communication protocols, and interfaces. These inconsistencies continue to pose challenges for buyers, and the development of unified industry standards is still needed. (2) Anti-Interference Capability Anti-jamming capability remains a common challenge in the building intercom industry. Product quality must improve in terms of resistance to interference, especially in regions prone to thunderstorms. During installation, improper wiring or the selection of substandard cables can also cause signal interference. Both product suppliers and installers must pay closer attention to this issue to ensure reliable performance. (3) Cost Reduction Currently, the costs associated with sales, engineering installation, and after-sales services for large manufacturers remain high. As products become more standardized and installation and service processes become more socialized, there is a clear need for cost reductions over time. (4) Human-Centered Design Intercom and smart home products are designed for the general public, so user-friendly design is essential. This includes intuitive operation interfaces for devices like indoor units and door stations. Users expect products to be as simple as possible, suitable for children and the elderly, with features like voice prompts and family messages during use. Visual interfaces should be more engaging than just text-based instructions. Digital IP intercom systems, with their advanced features and multiple menu options, require even greater emphasis on human-centered design to enhance usability. Third, the evolving strategy of access control systems. Over the years, access control systems have seen significant improvements. In newly developed residential and commercial buildings, the entrance security system has become an essential part of daily life. The application types of these systems have evolved from contact-based to contactless, from magnetic stripe cards and IC cards to biometric authentication. In terms of audio technology, traditional methods have been upgraded to digital AEC technology independently developed by Sizheng. This improved product offers high performance at a lower cost and reduced energy consumption, completely eliminating echo. It also features an intelligent digital FPGA dual-core wide dynamic noise reduction algorithm, ensuring clear sound even in complex environments. In the coming years, this innovation will likely drive competition among domestic access control companies, leading to a more standardized and rational market. After nearly a decade of development, access control systems are now quite mature in both functionality and market application. Manufacturers are increasingly focusing on enhancing the added value of their systems, aiming to integrate them with other technologies such as video recognition, electronic patrols, and visitor management. Integration with video surveillance systems has become a hot topic among manufacturers. At the same time, the stability and integrability of access control software are continuously improving. In the future, access control systems will evolve into comprehensive security platforms. Finally, it's worth noting that in the future development of security systems, no single company will be able to cover all applications. Access control providers will increasingly collaborate with contractors, software developers, security firms, and real estate companies. Under the influence of diverse application requirements from these partners, access control systems will become more intelligent and adaptable, bringing new possibilities to the industry.

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