visiplex VS4820 - Page 8

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17. Radio TX Antenna – BNC connector for the VS4820 built-in radio transmitter.
18. Power On – LED indicator for unit activity status.
19. Radio TX/RX – LED indicator for the unit radio reception and transmission activity.
20. Call Status – LED indicator that monitor panic buttons activity and call placements.
21. Phone Line – LED indicator to show the status of phone line during dial in & out activity
22. CAPS – LED indicator for the keyboard CAPS Lock status.
23. LTE/GPS Antenna – SMA antenna connector for the LTE modem or GPS receiver module options.
24. Wi-Fi Antenna – SMA antenna connector for the built-in Wi-Fi option.
25. RX Antenna – SMA antenna connector for the built-in radio receiver.