Pete, Go with ANSI/EIA/TIA-496-A-1989. There is no FCC spec., but RS 496 values are good. Last I knew anyway...
Best regards, Stephen C. Phillips ----- Begin Included Message ----- >From [email protected] Tue Dec 17 13:14:19 1996 To: [email protected] From: "Pete Van Raalte" <[email protected]> To: [email protected] List-Post: [email protected] Date: Tue, 17 Dec 1996 10:11:53 EST Subject: US DTMF Requirements TREG'ers, I am looking for specs on DTMF frequency, amplitude, and twist in the US. I have found one listing in ANSI/EIA/TIA-496-A-1989, but I have not found anything in FCC requirements. Is DTMF specified somewhere in the bowels of Part 68? advTHANKSance Pete ---------------------------------------------------------------------------- Peter Van Raalte | Email: [email protected] Compliance Engineer | V-Band Corporation | Phone: 914-789-5117 565 Taxter Road | Elmsford NY 10523 | FAX: 914-347-3432 --------------------------------------------------------------------------- ----- End Included Message -----
