Tell them to buy the book... https://webstore.ansi.org/standards/atis/ansit14011993 Ring cadence or ring back tone cadence? 20 cycles per second is most cases for the ringing.
From: Ken Hohhof Sent: Tuesday, March 12, 2019 2:38 PM To: 'AnimalFarm Microwave Users Group' Subject: Re: [AFMUG] [OTish] Where is Phone Ring Cadence Defined? Funny they think IETF would define that. Traditional ringing is 2 seconds on, 4 seconds off. Although it can be different in the case of the “distinctive ring” feature, like where each party on a party line would have their own ringing pattern. In the 80’s I was a digital channel bank guy so my first reference would be Bell PUB43801, but I don’t think I have a copy around. I did a quick look in my other bible, Transmission Systems for Communications, and I don’t see it in there. If you look at old timey ring generators, the default is 2 on, 4 off. http://www.charlesindustries.com/download/VF_Practices_in_PDF/LT850-200-201.pdf From: AF <af-boun...@af.afmug.com> On Behalf Of Tim Cailloux Sent: Tuesday, March 12, 2019 2:59 PM To: AnimalFarm Microwave Users Group <af@af.afmug.com> Subject: Re: [AFMUG] [OTish] Where is Phone Ring Cadence Defined? It's a Bellcore standard. You'll probably have luck if you start searching for that, from the days when Bell was the telephone company. Here's the European (ETSI) ringing standards, which I found when searching for the Bell standards: https://www.etsi.org/deliver/etsi_es/201000_201099/201071/01.01.02_50/es_201071v010102m.pdf It should give you a reference for searching. tim On Tue, Mar 12, 2019 at 3:46 PM Christopher Gray <cg...@graytechsoftware.com> wrote: I’m working with Cambium support, and they asked me to provide them with the RFC that defines the North American ring cadence. I can’t seem to find an RFC that defines it (presumably since it was defined long before RFC existed). Any suggestions for where to find North American ring cadence defined? I know what it is, but Cambium wants a reference. Thank you, Chris -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com -- Tim Cailloux Southern Internet -- Locally Owned and Operated t...@southern-internet.com (404) 406-9911 -------------------------------------------------------------------------------- -- AF mailing list AF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com
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