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Joined: Feb 2014
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Hi all,

My school has a Dukane Starcall intercom system. Plugged into the main rack is a desktop paging mic that sends that audio to certain zones. Recently, whenever an announcement is made from the mic, a speaker call-in is placed to the main ATEL in the main office. Out of curiosity, what do you think some possible causes may be?

Thanks,

Matteo

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The call in line is picking up the audio this can be caused by a few problems. A short in the wire or the wrong type of wire used, improper wired or damaged call switch would be my first spots to check.


Merritt

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Ok- Thanks so much.

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If it is always the same room that calls-in, we had a similar situation recently on a Bogen Multicomm. Turns out that the shield for that room that generated the bogus call-in wasn't grounded. This allowed 'leakage' of the high level 25 volt line to affect the speaker line, generating the call-in. So, you can try grounding the shield, ONE END ONLY (preferably at the PA rack) and see what happens.


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