The DS-K1T502DBWX-CQR Access Control Terminal manages access control and intercom functions in one device. It features IP65 and IK09 protections, as well as increased stability with zinc alloy materials. The terminal supports multiple authentication methods, including card, PIN, and QR code. It can be remotely controlled via the Hik-Connect mobile app and connects to external access controllers via the Wiegand protocol. The intercom function operates via the SIP protocol, supporting various SIP servers such as Brekeke, miniSipServer, FreePBX, Asterisk, 3CX, ELASTIX, and PBXware. The terminal also supports RS-485 communication for connecting external card readers and calling elevators, AP mode, and Bluetooth communication with smartphones for door access. The calling button can be used to call the management center, indoor station, specified indoor station, or Hik-Connect App. It supports up to 256 GB SD card memory and allows PIN settings under platform and local modes. The device also supports installing a QR code peripheral for dynamic QR code authentication.