In a message dated 9/19/2002, Matt Aschenberg writes:
> Our engineering team is looking for a spec that defines U.S pulse dialing. > Any suggestions? > Hi Matt: As you may know, there are no regulatory requirements for pulse dialing in FCC part 68. This means that any requirements you apply will be self-imposed. Simply stated, US pulse dialing uses a 60/40 break/make ratio and a nominal 10 pulses per second. Thus, each pulse consists of a nominal 60 mS break followed by a 40 mS make. The number of pulses corresponds to the digit dialed, except that a "0" is ten pulses. If you want a detailed specification for pulse dialing, you can use TIA/EIA-470-B, "Telephone Sets With Loop Signalling." Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 http://www.randolph-telecom.com
