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Looking for information about PSTN standards

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mehboob_iiui

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where can i get information on pstn standars, I want to know the voltage and current levels when getting dial tone, or a ring, and things like that..
 

mehboob_iiui

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Re: PSTN Standars

I could not find it from there, if you have seen such a standard please provide an exact link or a downloadable file. thankyou.
 

alzomor

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