View single post by ident

Posted: Saturday Oct 27th, 2012 01:42 pm

Joined:	Wednesday Aug 9th, 2006
Location:	Singapore
Posts:	3493
Status:	Offline

So the problem is with remote phone to Keypad and DS02. The DS02 and KP side is too loud

Howling occurs when the loop gain is too high, This can be phone to DP or DP to Phone

Try reducing the value of Tuning Parameter 87 Remote Phone Line In Gain to KP/DP Intercom default value is 13. Reduce to eg 9 and see if the howling is reduced but voice on DP is still audible

Also there is a hardware adjustment on DS02 speaker, That is normally midway, try to reduce

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