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OBi312 - VoIP adapter that connects your analog phone to Telco and VoIP services | Poly, formerly Plantronics & Polycom
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Amazon.com : ring-u Hello Hub Small Business Phone System (PBX) and Service (VOIP). Up to 30 Lines and 75 Extensions. Keep Your Number! Set-up Easier Than a Wireless Router. Ring-u Service Required. :
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