Detroit Locksmith Home About us Residential Commercial Free estimate Contact us Emergency Services Locksmith Services Auto / Car Locksmith Residential Locks Commercial Locks Alarm Systems CCTV Access Control Intercom Systems Phone Systems Search: 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 Residential Commercial Estimate Contact us © 2024 All rights reserve. Locksmith| Phoenix locksmith| Houston locksmith| Seattle locksmith| Locksmith Detroit