Main features
- Full Duplex for natural, hands-free communication with high volume
- Modules for implementation of special SIP stations with up to three call buttons
- Built-in switch with downlink function for direct connection of another IP device (e.g. IP camera)
- Memory for pre-recorded audio (e.g. waiting information)
- Control of the 2 relays e.g. as door opener
- Operation without Server possible
- Complies with SIP standard for easy integration in SIP capable PBXes
SIP module with switch and RJ 45 ports for IP Uplink/Downlink. Ready for connection of up to 3 call buttons, loudspeaker, microphone and LED for call status.
2.5 W Class "D" amplifier; 2 relay outputs (switching contacts); Power supply either external 12 – 24 V AC or 15 – 35 V DC, or via PoE – Power over Ethernet (IEEE 802.3af); SNMP for call station monitoring; Integrated web server for configuration and firmware updates.
source: http://www.commend.com/en/intercom/systems/intercom-terminals-intercom-modules-sip-modules-200150/sip_et_908a-2.html