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MrElectronicman · 27th Oct 2011, 7:57 pm

American analog telephones use different levels for transmit and receive, than do British phones. If remember correctly the American levels are -16dBM receive and +8dBm transmit. So if you connect an American phone to a British line, you likely pick up more noise from the line as they are more sensitive.

I have had the reverse problem using a British phone on the American system, where it was hard to hear what someone was saying.

27th Oct 2011, 7:57 pm	#10
MrElectronicman Heptode Join Date: Feb 2011 Location: Washington DC, USA Posts: 619	Re: 1980s Tyco Big Block "Lego" Phone American analog telephones use different levels for transmit and receive, than do British phones. If remember correctly the American levels are -16dBM receive and +8dBm transmit. So if you connect an American phone to a British line, you likely pick up more noise from the line as they are more sensitive. I have had the reverse problem using a British phone on the American system, where it was hard to hear what someone was saying.