Obihai OBi504vs 4-Port Universal VoIP Adapter, 4 FXS Gateway Rack Mountable 
New open box without retail box. Comes as pictured with light handling marks from testing technicians handling. Comes with power and ethernet cords. see pictures. 
4 port VoIP Adapter connects small business analogphones to the digital voice communications Obihai OBi504vs is an extremely cost-effective analog telephone adapter with cutting-edge technology. The OBi504vs is ultra-flexible and can be configured to be used for many voice and fax applications. Businesses using premise-based open-standard platforms such as Asterisk, FreePBX, PBX in a Flash or other SIP-based systems will be able to leverage the OBi504vs phone ports as user phone or fax extensions. Likewise, the OBi504vs can be deployed where the business is using a hosted service and need connections available with the OBi504vs for phones, fax machines and paging systems.• 4 FXS Telephone Ports - Use with Regular Phones, Faxes and Legacy Systems
• 1 PSTN Line Port with Relay to FXS Phone Port 1 – Use with Line Powered Phone Service in the Event of a Power Outage
• 3 USB Ports - Use with supported Obihai USB Accessories
• 4 Port Ethernet Switch - 1 GigE + 3 Fast Ethernet
• 1 Line-In Audio Port - Add Music-on-Hold Audio to Calls in Progress
• 1 Line-Out Audio Port - Use with Paging Systems - SIP Addressable

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