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  • Q: 1) ZJ_G1 WIFI module Access Controller,When you power up the WiFi socket/switch normally but fail to control it

  • A:

    the first thing you should do is to check the blinking status of the green indicator LED blinking status. Usually, there are two kinds of blinking statuses:

    1. THE green LED quickly blinks one time and repeats, which means the device has failed to

    connect to the router.

    2. THE green LED quickly blinks twice and repeats, which means the device has connected to the

    router but fails to connect to the server.

    After judging the problem, you can troubleshoot the problems accordingly with below

    solutions.


    8 Solutions to Failed to Connect to the Router


    1. Wrong WiFi Name or PWD:

    You may have entered the wrong WiFi name and password in the pairing process. Please make sure

    you have entered them exactly and select remember password.

    2. Weak WiFi Signal

    Your device may be too far away from the router, which causes a weak WiFi signal. Please try

    again with a strong WiFi signal.

    3. Phone Unable to Connect to WiFi

    Your router or phone may come across some error, which causes a connection failure. Please

    make sure your phone can access the WiFi router and works normally. If your phone has

    WiFi network in the Access Point but the device still fails to connect to the router, please refer

    to the below solutions.

    4. Too many devices connect to the APP

    There might be too many devices connect to the APP which connects with the router, please turn off the devices or turn off the APP and try again


    5. Too Many Connections to One Router

    You may have too many devices connecting to one router. Please disconnect other devices

    and try again.

    6. Router Error

    Router error. Please restart your router and try again.

    7. MAC Address Prohibited

    For some security reasons, your MAC address may be filtered and prohibited. Under such a

    condition, you should remove it from the prohibited address list.

    8. MAC Address Conflict

    Close all other connected devices to this router and try again.

    9. DHCP tenancy term problem

    Prohibit DHCP or extending the DHCP tenancy term when DHCP is open.

    10. Under the condition of disabled DHCP or open DHCP, you can extend the lease.


    7 Solutions to Failed to Connect to Server

    1. Unable to Visit Internet

    If the whole outer network cannot be accessed, then use your phone or PC to visit the Internet. If

    successful, try to connect your device again.

    2.Bandwidth Occupied

    You may have downloaded too many files at the same time, which occupied most of the

    bandwidth, thus your device did not have enough bandwidth to connect to the server. If so,

    please stop downloading and try again.

    3.More than one router with the same name

    You may have more than one router with the same name, and your device may have

    connected to the non-networked one. In this case, you should reset your router name and

    choose the networked one to connect. Then try to connect your device again.

    4.More than one DHCP server under one network

    There may be errors existing between router topology. In this case, please check the

    connection way between routers, then try again.

    5.ARP Attacked

    If you have checked all the above and found them no problems, maybe some terminal of the local

    area network you are locating has affected the ARP virus. We suggest you to manually bind

    the gateway and MAC address, then try again.

    6.Firewall Settings

    You may have opened a firewall or some security software. In this case, please temporarily

    close them and try to connect the device again.

    7.DNS Server Inaccessible

    After making all the above checks and finding them no problems, the possible problem should be

    DNS error. Please manually change the DNS server address and try again.

    If still facing any questions, pls contact us: sales@s4a-access.com at your convenient time!

    Appreciate your support!

  • Q: 2)What are the 3 types of access control?

  • A:

    Three Types of Access Control

    Three access control paradigms organize how people gain access: role-based access control (RBAC), discretionary access control (DAC), and mandatory access control (MAC).

  • Q: 3)What is the rule in access control?

  • A:

    Access Control Rules. An access control rule maps a domain, an object type, a life cycle state, and a participant to a set of permissions. An access control rule specifies the rights of a user, group, role, or organization to access objects of a specified type and state within a domain.

  • Q: 4)What are the two types of access control?

  • A:

    There are two types of access control: physical and logical. Physical access control limits access to campuses, buildings, rooms, and physical IT assets. Logical access control limits connections to computer networks, system files, and data.

  • Q: 5)What are the four parts of access control?

  • A:

    Access control models have four flavors: Mandatory Access Control (MAC), Role Based Access Control (RBAC), Discretionary Access Control (DAC), and Rule Based Access Control (RBAC or RB-RBAC). Let's look at each of these and what they entail.

  • Q: 6)What is the best access control system?

  • A:
    • Kisi: Best Access Control System Overall. Kisi. ...

    • ISONAS: Best Access Control System for Very Small Businesses. ISONAS. ...

    • Johnson Controls: Best Access Control System for Businesses With Multiple Locations. Johnson Controls. ...

    • ADT: Best Video Surveillance System. ...

    • Vanderbilt Industries: Best Access Control System for Multiple Doors.


  • Q: 7)How do you implement access control?

  • A:

    Here are six tips for implementing access control systems successfully:

    1. Implement a central repository with well-defined whitelisting policies. ...

    2. Solve self-generated scripts. ...

    3. Withdraw your departing employees' digital rights. ...

    4. Adapt your access control. ...

    5. Create consistent processes to whitelist new cloud applications.


  • Q: 8)What is physical access control?

  • A:

    Physical access control refers to the selective restriction of access to space. Examples of physical access control include fob controlled gates, RFID doors and password protected IT systems. It's important for access control measures to be able to adapt to changing access requirements.

  • Q: 9)What is the main purpose of access control?

  • A:

    Access control systems may also be used to control access into certain areas located within the interior of buildings. The purpose of an access control system is to provide quick, convenient access to those persons who are authorized, while at the same time, restricting access to unauthorized people.

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Contact Us
  S4A-Security For All.S4A Industrial Co., Limited, Founded in 2010, We have been dedicating in access control production R&D and sales for 10year till now. With the belief that we do one thing well in a lifetime, our CEO has been in this industry for 15 years. During the past 10 years, our products have been exported to various countries and regions. And 90% of customers come from the recommendations of cooperative customers, and 80% of the turnover comes from cooperative customers in the past 10years.Your business is a plant, we are the gardener, our mission is to water and fertilize the plant, and make it become the towering tree. We attach great importance to the partner's appeal, customer's suggestions, and feedbacks. To strengthen Product quality awareness, client's service awareness. Our clients and S4A are on the same path walking for many years.       S4A's future would be even more brilliant, this is related to all of our staff's working sweat. When you join this team, you will feel an invisible power to drive walk forward. S4A mainly produces a series of security Door Access Control such as:Network Access Controller, Locker board, Electromagnetic lock, Standalone door Controller, Automatic door opener, etcOur team can manufacture products, sell products, and do after-sales.In the realm of access control, one company stands out for its unwavering commitment to providing security services for everyone. S4A, which stands for "Security for All," has been at the forefront of access control technology for the past 13 years. With its own state-of-the-art factory and a strong focus on research and development, S4A has continuously delivered cutting-edge access control machines with the latest functions. Their dedication to product quality, customer feedback, practicability, and cost performance sets them apart as a leader in the industry.Factory and R&D Expertise:S4A takes pride in its fully-equipped factory, where skilled engineers and technicians work tirelessly to develop and manufacture access control solutions that meet the highest standards. The company's investment in research and development has resulted in a steady stream of innovative products that cater to evolving security needs.By staying ahead of the curve, S4A ensures that their customers have access to the latest advancements in access control technology.Quality Assurance and Customer Feedback:At S4A, product quality is of paramount importance. The company adheres to rigorous quality control procedures throughout the manufacturing process to guarantee the reliability and durability of their access control machines. Each product undergoes comprehensive testing to ensure it meets industry standards and exceeds customer expectations. S4A also places great value on customer feedback, actively seeking input to continuously improve their products and services. By listening to their customers, S4A maintains a customer-centric approach and delivers solutions that address real-world security challenges.Practicability and Cost Performance:S4A understands that access control solutions must not only be technologically advanced but also practical and cost-effective. The company's emphasis on practicability means that their products are designed to be user-friendly, easily integrated into existing systems, and adaptable to various environments. S4A's access control machines are known for their intuitive interfaces, simple installation processes, and seamless compatibility with other security systems. Additionally, S4A strives to provide cost-effective solutions without compromising on quality. Their competitive pricing ensures that security is accessible to businesses and individuals of all sizes.With 13 years of industry experience, S4A has cemented its position as a leading provider of access control solutions. Through their dedication to "Security for All," the company has set a benchmark for excellence in product quality, customer satisfaction,practicability, and cost performance. S4A's in-house factory and research and development capabilities enable them to stay at the forefront of technological advancements in the field of access control. As the company continues to evolve and innovate, S4A remains committed to empowering individuals and organizations with the highest level of security, ensuring that everyone can enjoy the peace of mind that comes with a reliable and efficient access control system.We can create value for you!Quality takes great importance for a company's credibility, and buyer's every penny spend must worth it. That is our most basic principle. Our business mainly for wholesale, so we could offer large quantities at competitive prices. During the past 10 years, We work hard to create value for our customers, and with our help, customers have an increasing market share. 99% of the customer...<
  • Address

    Factory Address:Building S4A, South Third Lane, Qiuyuling Street, Zhangkeng Village, Hengli Town, Dongguan City, Guangdong Province Office Address:#601,floor 6 ,building 1,JINFANGHUA industrial zone, Bantian St. Longgang Dist. Shenzhen, PRC.

  • Call us

    0086 755 29450011

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If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

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