====== FreePBX with IP Door Phone ======

http://community.freepbx.org/t/intercom-door-opener-w-freepbx/21994/3

http://www.ebay.com/itm/IP-Sip-door-phone-intercom-opener-electric-bell-for-Asterisk-Avaya-Alcatel-MAUS-/121525848327

http://www.aliexpress.com/store/product/Security-SIP-door-phone-asterisk-compatible-PoE-model/500745_1547592378.html

http://niteray.com/

http://www.cyberdata.net/products/voip/digitalanalog/intercom_endpoints.html

http://www.2n.cz/en/products/intercom-systems/ip-intercoms

{{ :voice:pbx:freepbx:door_phone_intercom.jpg?550 |Door Phone Intercom}}