From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id a9246ace for ; Fri, 24 Jan 2020 01:28:59 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id D3C1F9C283; Fri, 24 Jan 2020 11:28:56 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 791EE9C27E; Fri, 24 Jan 2020 11:28:27 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id 7E8B39C280; Fri, 24 Jan 2020 11:28:24 +1000 (AEST) Received: from lb1-smtp-cloud8.xs4all.net (lb1-smtp-cloud8.xs4all.net [194.109.24.21]) by minnie.tuhs.org (Postfix) with ESMTPS id 76BDF9C27E for ; Fri, 24 Jan 2020 11:28:23 +1000 (AEST) Received: from mba2.fritz.box ([80.101.112.122]) by smtp-cloud8.xs4all.net with ESMTPA id unljiQEIPpLtbunlkiTEoC; Fri, 24 Jan 2020 02:28:21 +0100 From: Paul Ruizendaal Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.11\)) Message-Id: Date: Fri, 24 Jan 2020 02:28:19 +0100 To: TUHS main list X-Mailer: Apple Mail (2.3445.104.11) X-CMAE-Envelope: MS4wfOcMqu2HtHXl/V8oZZk+q75g5fOqyP4cXKYJCpavpLs8EjOxLTJPJSqBww+0OfQZwET7XnHYquwPg20WB+QLp4OaS2n0Zzknl/9z393UD1sQL3llJ4X4 qXg8kGnVt6iq26kNxL+qf+RJT5ECmNKP+zSr8JODodCw1SG0v5c6MlrA Subject: Re: [TUHS] Spider X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.26 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" > Ugh. Memory lane has a lot of potholes. This was a really long time = ago.=20 Many thanks for that post - really interesting! I had to look up "Pierce Network", and found it described in the Bell = Journal: = https://ia801903.us.archive.org/31/items/bstj51-6-1133/bstj51-6-1133_text.= pdf In my reading the Spider network is a type of Pierce network. However, the network that you remember is indeed most likely different = from Spider: - it was coax based, whereas the Spider line was a twisted pair - there was more than one, whereas Spider only ever had one = (operational) loop Condon and Weller are acknowledged in the report about Spider as having = done many of its hardware details. The report discusses learnings from = the project and having to tune repeaters is not among them (but another = operational issue with its 'line access modules=E2=80=99 is discussed). All in all, maybe these coax loops were pre-cursors to the Spider = network, without a switch on the loop (=E2=80=9CC=E2=80=9D nodes in the = Pierce paper). It makes sense to first try out the electrical and line = data protocol before starting work on higher level functions. I have no idea what a GLANCE G is...