You have to turn on the mike in the menu as I recall.  Here is what little
I have written down on it.  I can't remember if I clipped this out of the
menu or where...

    REMOTE MICROPHONE CONTROLLER

    If you have a DTMF microphone, you can use the
    microphone as a wired remote control unit as
    described below.

    1. Plug the DTMF microphone into the microphone
    connector of the transceiver.

    2. Press [MENU], then turn the MULTI/CH control to
    access Menu No. 45D.

    3. Press [+] to select ON.

    4Press [MENU] to store the setting and exit Menu
    mode.

    The DTMF keys function as follows:

    DTMF key
    Function
    FUNC mode
    1
    Scan
    -
    2
    Tone/CTCSS/DCS
    Code Select
    3
    REV
    SHIFT
    4
    MHz
    -
    5
    MONI
    Lock ON **
    6
    Voice 1
    Lock OFF **
    7
    Volume* Up/Down
    -
    8
    Band* Up/Down
    -
    9
    Squelch* Up/Down
    -
    0
    PWR* Up/Down
    -
    A
    ENT
    -
    B
    CTRL
    Main/Sub
    C
    Repeater
    -
    D
    FUNC
    Func OFF
    *
    Down
    Down
    #
    Up
    Up
    * Use the [#] (Up) and [*] (Down) keys to change the settings of these
    functions.
    * *The LOCK function is for the microphone keypad

    Note: Microphone Remote does not function while transmitting.
    You can use the D TMF Memory function {page 75} with the
    Microphone Remote function.
    The Repeater function is available for K-type models only.
    Normally, pressing [2] cycles through Tone, CTCSS, DCS, and
    OFE However, if 1750 Hz is selected for Tone, pressing [2] will
    only transmit the 1750 Hz tone. To return to Tone/ CTCSS/ DCS
    mode, you must first deselect 1750 Hz for Tone.
    Press [D] to enter FUNC mode, to use the 2nd function of the
    DTMF keys. Pressing [D] while in FUNC mode will exit FUNC
    mode.
    [FUNC] on the transceiver works independently from the
    Microphone Remote [FUNC] key.



73s
Butch Bussen
wa0vjr