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Old 12th Feb 2019, 10:05 pm   #8
Graham G3ZVT
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Join Date: May 2010
Location: Greater Manchester, UK.
Posts: 18,676
Default Re: BT Inspiration (+ Versatility etc) PA Connection?

"Valcom" was the PA adapter I used to install. It just connected to a spare POTS extension port.

The type we used had no delay.
In one large factory feedback was a serious problem, but I solved it by identifying the phones that were likely to be used to make announcements and desensatised the microphone with a series resistor.

This also improved normal calls because the factory was very noisy and you needed to shout anyway.
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Last edited by Graham G3ZVT; 12th Feb 2019 at 10:18 pm.
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