E-and-M Interface DTMF-MF
By Ken Martin, ; posted March 15, 2007; hits 1460
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| In the mid 1980's I was involved in a short lived project to create a micorprocessor controlled DTMF to MF outbound converter using 4 wire E&M trunks on both the PBX side and the C.O. side. This portion shows the E-and-M Interface portion. |