18KHz. Intercom: Supported, Built-in Microphone. Running Temperature level: -20 ～ 50 ℃. Measurements: 283.1 * 224.3 * 269mm. Network Ceiling Speaker GEN-6211A03 Power Supply: DC 24V/1A or POE. Interaction Protocols: TCP/IP, UDP, SIP, ONVIF. Signal-to-Noise Proportion: > 80dB. IP Speaker Frequency Feedback: 100Hz

Valcom's V-2003A Page Regulate presents telephone system usage of 3 zones of 1-way paging and it has built-in tones for constant, warble and alert. Transmission buildings also do not need any equipment on them that attaches for the power lines. A distribution line could possibly have fuses, transformers, voltage regulators, capacitors, reclosers