From owner-cvs-all Wed Aug 16 8:17: 8 2000 Delivered-To: cvs-all@freebsd.org Received: from gndrsh.dnsmgr.net (GndRsh.dnsmgr.net [198.145.92.4]) by hub.freebsd.org (Postfix) with ESMTP id 6C19D37C057; Wed, 16 Aug 2000 08:16:58 -0700 (PDT) (envelope-from freebsd@gndrsh.dnsmgr.net) Received: (from freebsd@localhost) by gndrsh.dnsmgr.net (8.9.3/8.9.3) id IAA14510; Wed, 16 Aug 2000 08:16:51 -0700 (PDT) (envelope-from freebsd) From: "Rodney W. Grimes" Message-Id: <200008161516.IAA14510@gndrsh.dnsmgr.net> Subject: Re: cvs commit: src/usr.sbin/ppp i4b.c In-Reply-To: <20000816152421.J2184@pavilion.net> from Josef Karthauser at "Aug 16, 2000 03:24:21 pm" To: joe@pavilion.net (Josef Karthauser) Date: Wed, 16 Aug 2000 08:16:51 -0700 (PDT) Cc: brian@FreeBSD.org (Brian Somers), cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org X-Mailer: ELM [version 2.4ME+ PL54 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-cvs-all@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG > 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