OCB-L3904 – Network Access Controller (Four-Door Access Controller)

The OCB-L3904 Network Access Controller is a robust and reliable four-door access control solution designed for small to medium-scale security installations. Powered by a 32-bit high-speed processor, this controller delivers stable performance, secure network communication, and flexible access management through TCP/IP connectivity.

With support for Wiegand W26/W34 card readers, encrypted data transmission, and both online and offline operating modes, the OCB-L3904 ensures continuous access control even during network interruptions. Its comprehensive alarm handling, multi-card type support, and remote management capabilities make it an excellent choice for commercial buildings, offices, residential complexes, and industrial facilities.

Product Features

• Four-Door Access Control – Independently manages up to four doors
• 32-bit High-Speed Processor – Ensures fast response and stable operation
• Secure TCP/IP Communication – Encrypted network data transmission for enhanced security
• Wiegand Reader Support – Compatible with W26/W34 and third-party card readers
• Card & Event Storage – Stores up to 10,000 cards and 50,000 access records
• Multiple Card Types Supported – Normal, disabled, blocklist, patrol, visitor, duress, and super cards
• Advanced Door Functions – First card open, super card, super password, remote door control
• Online & Offline Operation – Maintains access control during network outages
• Remote Management – Supports online upgrade and remote door control
• Comprehensive Alarm System –
– Card reader tamper alarm
– Door unsecured alarm
– Forced entry alarm
– Door opening timeout alarm
– Duress alarm
– Invalid card swiping alarm
– Case-in alarm and restore alarm
– Offline storage full alarm
– Network disconnection alarm
• Extended Card Number Support – Stores card numbers up to 20 digits
• Visual Status Indicators – Power, communication, and abnormal status LEDs

Product Advantages

• Cost-effective four-door controller for network-based access control
• Secure encrypted TCP/IP communication
• Reliable offline operation with event buffering
• Wide compatibility with standard Wiegand readers
• Strong alarm and monitoring capabilities
• Compact design suitable for control cabinets or wall mounting
• Easy integration into standalone or networked access systems

Professional Applications

• Office buildings and corporate facilities
• Residential complexes and gated communities
• Warehouses and industrial plants
• Educational institutions
• Small to medium commercial access control projects
• Network-based standalone access control systems

The OCB-L3904 Network Access Controller delivers dependable four-door access control with secure TCP/IP communication, comprehensive alarm management, and flexible card handling. With support for offline operation, remote management, and industry-standard Wiegand readers, it is a practical and scalable solution for professional access control installations.