Dial Tone

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kb3ejv
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Dial Tone

Post by kb3ejv » Fri Jul 30, 2004 5:52 pm

Anyone know what the frequency of a dialtone is? Is it one frequency or two frequencies combined, and what are they?<p>Thanks to anyone who can help...

dyarker
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Re: Dial Tone

Post by dyarker » Fri Jul 30, 2004 6:01 pm

350Hz and 440Hz combined.<p>Other countries may use different dial tone frequencies simply because they choose a different standard way back when. PBXs and key systems may use different frequencies intentionally so you can tell which switch you are getting the signal from.<p>Cheers,<p>[ July 30, 2004: Message edited by: Dale Y ]</p>
Dale Y

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