San Jose Locksmith Home About us Emergency services Residential Commercial Free estimate Contact us Search:  Emergency Service Locksmith Services Car / Auto Locksmith   Residential Locks Commercial Locks Alarm Systems CCTV Access Control Intercom Systems Phone Systems Phone Systems Back To: Phone Systems Products 909A Universal Coupler 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 New York locksmith| Los Angeles locksmith| Chicago locksmith| Washington DC locksmith Philadelphia locksmith| San Francisco locksmith| Oakland locksmith| Locksmith San Jose