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73M2901CE ring detection using optocouplers

Posted: 25 Jul 2011  Print Version  Bookmark and Share Subscribe 

Keywords:Optocouplers  ring detection 

[Summary of tips] Optocouplers have been commonly used for telecom ring detection for many years due to their simplicity and ease of use. This document shows a typical half wave optocoupler circuit. All the components except U1 and D1 are in series, therefore the order in which they are connected is not important. The ring detect circuit must be......
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