'- Night Ringer- Compatibility with more IP/PBX servers - Dual speed 10/100 Mbps- Page up to 15 paging zone groups- Web-based configuration- Web-based firmware upgradeable- PoE 802.3af enabled (Power-over-Ethernet)- Connector for external power supply- Small footprint- Delayed ringing- Protocol: SIP RFC 3261 Compatible- Ethernet I/F: 10/100 Mbps- Power Input: PoE 802.3af or 48VDC- Operating Temperature: -30 to 55C (-22 to 131F)- Payload Types: G711- Output Signal Amplitudes: 2.0 VPP maximum- Output Level: +2dBm nominal- Total Harmonic Distortion: 0.5% maximum- Regulatory Compliance: FCC Class A, UL 60950