Date: Wed, 16 Aug 2000 08:16:51 -0700 (PDT) From: "Rodney W. Grimes" <freebsd@gndrsh.dnsmgr.net> To: joe@pavilion.net (Josef Karthauser) Cc: brian@FreeBSD.org (Brian Somers), cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/usr.sbin/ppp i4b.c Message-ID: <200008161516.IAA14510@gndrsh.dnsmgr.net> In-Reply-To: <20000816152421.J2184@pavilion.net> from Josef Karthauser at "Aug 16, 2000 03:24:21 pm"
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> On Wed, Aug 16, 2000 at 06:54:04AM -0700, Brian Somers wrote: > > brian 2000/08/16 06:54:04 PDT > > > > Modified files: > > usr.sbin/ppp i4b.c > > Log: > > ISDN B channels have a bandwidth of 64000, not 65536 > > Are you sure? It's supposed to be 64k (k = 1024). > How technically does 64000 work? Technical correctness is that ISDN channels are based upon the telco 8K Hz clock, thats 8,000 not 8192. You get 8 bits accross a standard TDM buss at 8K Hz, thats 64,000 not 65536. This change is _correct_. Note also that this is a common conversion error made by folks who have not worked with telco TDM busses. In almost all cases when dealing with k with respect to telco bit rates the k is going to be 1000, not 1024. Infact in almost all cases other than memory and disk capacities K or k is going to be 1000. -- Rod Grimes - KD7CAX @ CN85sl - (RWG25) rgrimes@gndrsh.dnsmgr.net To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe cvs-all" in the body of the message
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