Phoenix Locksmith  Home About us Emergency services Residential Commercial Free estimate Contact us Search:  Emergency Services Locksmith Services Auto / Car Locksmith Residential Locks Commercial Locks Alarm Systems CCTV Access Control Intercom Systems Phone Systems   Phone Systems 909A Universal Coupler Back To: Phone Systems Products This coupler is GRAY, and it has a amber LED on the front. Applications for this is music on hold, loudspeaker paging, auxiliary trunk paging. Home About us Emergency services Residential Commercial Free estimate Contact us Locksmith| Houston locksmith Detroit locksmith| Seattle locksmith| Locksmith Phoenix