Understanding Intercom

Discussion in 'Sound, Music, and Intercom' started by Brian_M, Oct 8, 2019.

  1. Brian_M

    Brian_M Member

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    Currently in school, and working on a final project. I'm trying to understand some of the logic on my own so bear with me...

    As a group we are attempting to create an intercom for our school tv production. We are not a glitzy school so it looks like we are working with some gently used equipment. We have an Adam frame with one AIO card, 2 fiber cards, and a few keypanels. I'm trying to follow what I've read online from RTS and Comms Guy, but I think the fiber cards are throwing me off. Just to be clear my setup is Frame>Fiber Card>Fiber Card>Keypanel. The fiber cards look exactly the same... 7707IT8.

    I can manage to get a DB9 cable from the adam to a keypanel (not using the fiber cards) to successfully work. But not on the other side of the card. Something must change with inputs/outputs, I'm guessing. There doesn't seem to be a guide combining these two brands. How can I wirie db9 adam side to fiber pins, and fiber pins to rj12 keypanel side?

    Thanks in advance.
     
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  2. microstar

    microstar Well-Known Member

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    You may have better luck over at the Wireless and Communications forum at http://forums.prosoundweb.com/index.php.
    You will have to register but it's worth it. Just be sure to "use your real name" as they are sticklers for that.
     
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  3. RonHebbard

    RonHebbard Well-Known Member Premium Member

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  4. TimMc

    TimMc Well-Known Member

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  5. AudioGreg

    AudioGreg Member

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    do you really need to use fiber? the db9 analog connection can be at least 1000ft long, maybe longer. in any event, the evertz fiber cards can be used with several types of systems so they need to be set up to use rs-485 data and 4W matrix audio to work with the ADAM. you also need to be sure the optical connections on the cards are inverse wavelengths at each end or they won't connect at all. the data path is bidirectional, but the audio is not so you will have to be sure that the matrix talk goes in the card input at that end, and the panel talk goes into the input on the other card.
     
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  6. Diana Mullis

    Diana Mullis Pro Intercom Owner Premium Member

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  7. Brian_M

    Brian_M Member

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    Thanks for the reply. If it's cool, I will do a sketch out and repost here. Will have to document it anyway. I love this stuff but sometimes it seems either overly complicated or too simple.
     
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  8. Diana Mullis

    Diana Mullis Pro Intercom Owner Premium Member

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  9. Brian_M

    Brian_M Member

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    Here is my "sketch" - Hopefully this clears things up. I didn't indicate data, because I know what I've done for that works at least.
     

    Attached Files:

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  10. Brian_M

    Brian_M Member

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    Also. Ignore the 1-4 numbers on the evertz card. I'm just using them as a pin reference later when I archive my notes.
     
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