Partyline: System feedback (Acoustical)

If you're getting feedback or howlround on your PL system there are number of possible causes
Cause 1: Listen Level control at this station or a Remote Station is set too high.
Cause 2: Sidetone Null control at this station or a Remote Station is not adjusted correctly.
Solution 2 : please adjust the sidetone or Null PL channel on this Station
Cause 3: Channel un-terminated.
Solution 3: Set the Main Station or Power Supply termination switch for that channel to the ON position. There should be only one termination per intercom channel
Cause 4: A headset extension cord was used.
Solution 4: Headset extension cords are not recommended as they can cause pickup between the headset mic and head-phones


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