Hello, I am having an issue in troubleshooting cortelco phones. The problem I am coming across is that the phones are giving out static, then the user cannot receive calls, disconnecting phone calls, muting phone calls,and at times the keypad does not work. This also happens with any new replacements I used to replace the phone. I take the phones elsewhere to a good jack and no issue. I re-punch the jack and any connections to the IDF and to the mdf. I tone the line for any shorts and see none. Any ideas?
Last edited by C64PC; 01/10/17 09:35 PM.
