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Thread: MIP 5000 Local Gateway Connector

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    Default MIP 5000 Local Gateway Connector

    Does anybody have the pinout of the DB-25 connector on a MIP 5000 Local Gateway (L3482)? I'm trying to see if it's possible to control an APX mobile with a local gateway for a single channel by making my own cable between the two.


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    mip5000localgatewayconnector.jpg

    The manual will tell you that you have to use a remote mount APX mobile... that's BS. PTT, COR (active low, hard-coded in firmware,) and TX/RX audio are all available on the rear accessory connector.
    "The Girl Scouts found several hungry REACT members at the finish line..."

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    billyfromhill (Jun 06, 2019)

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    So looking at this closer, is there any reason why a mobile other than a APX 7500 can be used with a MIP digital gateway? It would appear that all the proper pins would be present in the J2 connector of a 1500, 4500, or 6500.

    Also, is there any reason why there is no "TX-" pin on the local gateway? I assume the RX- pin just gets connected to J2-14 ground pin on the mobile.

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    Quote Originally Posted by billyfromhill View Post
    So looking at this closer, is there any reason why a mobile other than a APX 7500 (now 8500 works too) can be used with a MIP digital gateway? It would appear that all the proper pins would be present in the J2 connector of a 1500, 4500, or 6500.

    Also, is there any reason why there is no "TX-" pin on the local gateway? I assume the RX- pin just gets connected to J2-14 ground pin on the mobile.
    If I remember correctly, 7500 was the only radio, that did SB9600 protocol when remote accessory was selected (config for MIP digital g/w). the protocol is needed for visual feedback to the MIP resource, other than that. if the intention is to park on one channel, a local gateway is all what is needed. If you are making your own cable, don't forget to put the DC blocking caps on the audio lines.

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    motorola_otaku (Jun 11, 2019)

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    Gotcha, so here's how the pinout would work I believe. My Motorola dealer is going to blow a gasket when I show this to them because it's not "officially supported".

    DB-25 -> J2
    2 (COR) -> 13 (CHAN ACT) (ACTIVE LOW)
    3 (RX+) -> 21 (RX FILT OUT) (CAPACITOR)
    6 (PTT NO) -> 16 (PTT) (ACTIVE LOW)
    7 (MON NO) -> 22 (MONITOR) (ACTIVE LOW)
    11 (RX-) -> 1 (GND)
    12 (TX+) -> 23 (AUX MIC) (CAPACITOR)

    J2.jpg