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    MCC7500 GPOIM Query

    On the GPOIM, the Phone Jack has pin 1 & 2 and 7 & 8 shown as Aux In A/B- and +, respectively. Can anyone let me know if either, or which, can be utilized as an Off-Hook input so as to feed the analog telephone handset Tx and Rx audio to the Operators Headset and push the Radio Rx to the...