{"id":3702,"date":"2019-07-16T21:43:16","date_gmt":"2019-07-17T02:43:16","guid":{"rendered":"https:\/\/themuseumoftelephony.wordpress.com\/?p=3702"},"modified":"2025-08-13T21:46:30","modified_gmt":"2025-08-14T02:46:30","slug":"follow-up-a-brief-history-to-the-rolm-pbx-2","status":"publish","type":"post","link":"https:\/\/clickford.net\/telephony\/follow-up-a-brief-history-to-the-rolm-pbx-2\/","title":{"rendered":"Follow up: A Brief History to the ROLM PBX"},"content":{"rendered":"<p>I promise when we move to the big leagues away from WordPress, I&#8217;ll have a broader palette on subject matters! Meaning I can set the content and forget it!<\/p>\n<p>A follow up from yesterday&#8217;s post from Andy in Missouri had contacted me at least several years ago, perhaps in late 2016, around the time of the Ugly Console theme.\u00a0 As you have seen; he&#8217;s got a lot of insight of ROLM, the leading vendor of PBX systems in the country &#8211; only for a short time. Thank IBM and their uptight attitude towards a wild but hard working group of people out on the Left Coast, where some of their ideas was the seed to what would become the standard well into the Facebook days.<\/p>\n<p>I happened to reach out to him last fall to ask about the Redwood; ironically Joe The UCX Guy had posted an abandoned Redwood around the same time, however it was just pictures of that system.<\/p>\n<p>As you probably know, ROLM&#8217;s demise has been perceived failure on support of IBM to finance the company effectively and a lack of leadership made them fall behind in evolving technologies (such as It Still Does Nothing or ISDN?), resulting a sale to Siemens in 1991, and basically took their existing American clientele, and fused some of ROLM&#8217;s technologies with Siemens. ROLM is well known for their bullet proof PBX systems. Your local Sears Roebuck store is probably using a system that&#8217;s almost as old as I with sets older than your&#8217;s truly. The rest is an adaptation of an email from him discussing the differences of a failed small end system called the Redwood and their flagship unit, the 9751 and the CBX as in the Computer Branch Exchange.<\/p>\n<p>Like the last post, any first-person reference implies to Andy and not me.<\/p>\n<p><!--more--><\/p>\n<p>The Redwood was supposed to be a Key Telephone System, however, the software fit on what was called &#8220;the library card&#8221;. It was, more or less, the system&#8217;s processor card and storage for the system software. It&#8217;s unclear how this &#8220;card&#8221; would recognize the hardware, as RFID probably didn&#8217;t exist. The reason for the different &#8220;library card&#8221; was due to taxes and tariffs (one was cheaper than the other) as it&#8217;s unclear how this worked. Getting the system coming as a key system from the factory was an explanation given to me by the gentleman who gave me the system. As far as I am aware, these taxes wouldn&#8217;t apply to the customer&#8230;so the question could be pointed to this being\u00a0 related the taxes Rolm paid involving manufacturing of the systems?<\/p>\n<blockquote class=\"instagram-media\" data-instgrm-captioned data-instgrm-permalink=\"https:\/\/www.instagram.com\/p\/BqllapvhYwQ\/?utm_source=ig_embed&amp;utm_campaign=loading\" data-instgrm-version=\"14\" style=\" background:#FFF; border:0; border-radius:3px; box-shadow:0 0 1px 0 rgba(0,0,0,0.5),0 1px 10px 0 rgba(0,0,0,0.15); margin: 1px; max-width:636px; min-width:326px; padding:0; width:99.375%; width:-webkit-calc(100% - 2px); width:calc(100% - 2px);\">\n<div style=\"padding:16px;\"> <a href=\"https:\/\/www.instagram.com\/p\/BqllapvhYwQ\/?utm_source=ig_embed&amp;utm_campaign=loading\" style=\" background:#FFFFFF; line-height:0; padding:0 0; text-align:center; text-decoration:none; width:100%;\" target=\"_blank\"> <\/p>\n<div style=\" display: flex; flex-direction: row; align-items: center;\">\n<div style=\"background-color: #F4F4F4; border-radius: 50%; flex-grow: 0; height: 40px; margin-right: 14px; width: 40px;\"><\/div>\n<div style=\"display: flex; flex-direction: column; flex-grow: 1; justify-content: center;\">\n<div style=\" background-color: #F4F4F4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 100px;\"><\/div>\n<div style=\" background-color: #F4F4F4; border-radius: 4px; flex-grow: 0; height: 14px; width: 60px;\"><\/div>\n<\/div>\n<\/div>\n<div style=\"padding: 19% 0;\"><\/div>\n<div style=\"display:block; height:50px; margin:0 auto 12px; width:50px;\"><svg width=\"50px\" height=\"50px\" viewBox=\"0 0 60 60\" version=\"1.1\" xmlns=\"https:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"https:\/\/www.w3.org\/1999\/xlink\"><g stroke=\"none\" stroke-width=\"1\" fill=\"none\" fill-rule=\"evenodd\"><g transform=\"translate(-511.000000, -20.000000)\" fill=\"#000000\"><g><path d=\"M556.869,30.41 C554.814,30.41 553.148,32.076 553.148,34.131 C553.148,36.186 554.814,37.852 556.869,37.852 C558.924,37.852 560.59,36.186 560.59,34.131 C560.59,32.076 558.924,30.41 556.869,30.41 M541,60.657 C535.114,60.657 530.342,55.887 530.342,50 C530.342,44.114 535.114,39.342 541,39.342 C546.887,39.342 551.658,44.114 551.658,50 C551.658,55.887 546.887,60.657 541,60.657 M541,33.886 C532.1,33.886 524.886,41.1 524.886,50 C524.886,58.899 532.1,66.113 541,66.113 C549.9,66.113 557.115,58.899 557.115,50 C557.115,41.1 549.9,33.886 541,33.886 M565.378,62.101 C565.244,65.022 564.756,66.606 564.346,67.663 C563.803,69.06 563.154,70.057 562.106,71.106 C561.058,72.155 560.06,72.803 558.662,73.347 C557.607,73.757 556.021,74.244 553.102,74.378 C549.944,74.521 548.997,74.552 541,74.552 C533.003,74.552 532.056,74.521 528.898,74.378 C525.979,74.244 524.393,73.757 523.338,73.347 C521.94,72.803 520.942,72.155 519.894,71.106 C518.846,70.057 518.197,69.06 517.654,67.663 C517.244,66.606 516.755,65.022 516.623,62.101 C516.479,58.943 516.448,57.996 516.448,50 C516.448,42.003 516.479,41.056 516.623,37.899 C516.755,34.978 517.244,33.391 517.654,32.338 C518.197,30.938 518.846,29.942 519.894,28.894 C520.942,27.846 521.94,27.196 523.338,26.654 C524.393,26.244 525.979,25.756 528.898,25.623 C532.057,25.479 533.004,25.448 541,25.448 C548.997,25.448 549.943,25.479 553.102,25.623 C556.021,25.756 557.607,26.244 558.662,26.654 C560.06,27.196 561.058,27.846 562.106,28.894 C563.154,29.942 563.803,30.938 564.346,32.338 C564.756,33.391 565.244,34.978 565.378,37.899 C565.522,41.056 565.552,42.003 565.552,50 C565.552,57.996 565.522,58.943 565.378,62.101 M570.82,37.631 C570.674,34.438 570.167,32.258 569.425,30.349 C568.659,28.377 567.633,26.702 565.965,25.035 C564.297,23.368 562.623,22.342 560.652,21.575 C558.743,20.834 556.562,20.326 553.369,20.18 C550.169,20.033 549.148,20 541,20 C532.853,20 531.831,20.033 528.631,20.18 C525.438,20.326 523.257,20.834 521.349,21.575 C519.376,22.342 517.703,23.368 516.035,25.035 C514.368,26.702 513.342,28.377 512.574,30.349 C511.834,32.258 511.326,34.438 511.181,37.631 C511.035,40.831 511,41.851 511,50 C511,58.147 511.035,59.17 511.181,62.369 C511.326,65.562 511.834,67.743 512.574,69.651 C513.342,71.625 514.368,73.296 516.035,74.965 C517.703,76.634 519.376,77.658 521.349,78.425 C523.257,79.167 525.438,79.673 528.631,79.82 C531.831,79.965 532.853,80.001 541,80.001 C549.148,80.001 550.169,79.965 553.369,79.82 C556.562,79.673 558.743,79.167 560.652,78.425 C562.623,77.658 564.297,76.634 565.965,74.965 C567.633,73.296 568.659,71.625 569.425,69.651 C570.167,67.743 570.674,65.562 570.82,62.369 C570.966,59.17 571,58.147 571,50 C571,41.851 570.966,40.831 570.82,37.631\"><\/path><\/g><\/g><\/g><\/svg><\/div>\n<div style=\"padding-top: 8px;\">\n<div style=\" color:#3897f0; font-family:Arial,sans-serif; font-size:14px; font-style:normal; font-weight:550; line-height:18px;\">View this post on Instagram<\/div>\n<\/div>\n<div style=\"padding: 12.5% 0;\"><\/div>\n<div style=\"display: flex; flex-direction: row; margin-bottom: 14px; align-items: center;\">\n<div>\n<div style=\"background-color: #F4F4F4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(0px) translateY(7px);\"><\/div>\n<div style=\"background-color: #F4F4F4; height: 12.5px; transform: rotate(-45deg) translateX(3px) translateY(1px); width: 12.5px; flex-grow: 0; margin-right: 14px; margin-left: 2px;\"><\/div>\n<div style=\"background-color: #F4F4F4; border-radius: 50%; height: 12.5px; width: 12.5px; transform: translateX(9px) translateY(-18px);\"><\/div>\n<\/div>\n<div style=\"margin-left: 8px;\">\n<div style=\" background-color: #F4F4F4; border-radius: 50%; flex-grow: 0; height: 20px; width: 20px;\"><\/div>\n<div style=\" width: 0; height: 0; border-top: 2px solid transparent; border-left: 6px solid #f4f4f4; border-bottom: 2px solid transparent; transform: translateX(16px) translateY(-4px) rotate(30deg)\"><\/div>\n<\/div>\n<div style=\"margin-left: auto;\">\n<div style=\" width: 0px; border-top: 8px solid #F4F4F4; border-right: 8px solid transparent; transform: translateY(16px);\"><\/div>\n<div style=\" background-color: #F4F4F4; flex-grow: 0; height: 12px; width: 16px; transform: translateY(-4px);\"><\/div>\n<div style=\" width: 0; height: 0; border-top: 8px solid #F4F4F4; border-left: 8px solid transparent; transform: translateY(-4px) translateX(8px);\"><\/div>\n<\/div>\n<\/div>\n<div style=\"display: flex; flex-direction: column; flex-grow: 1; justify-content: center; margin-bottom: 24px;\">\n<div style=\" background-color: #F4F4F4; border-radius: 4px; flex-grow: 0; height: 14px; margin-bottom: 6px; width: 224px;\"><\/div>\n<div style=\" background-color: #F4F4F4; border-radius: 4px; flex-grow: 0; height: 14px; width: 144px;\"><\/div>\n<\/div>\n<p><\/a><\/p>\n<p style=\" color:#c9c8cd; font-family:Arial,sans-serif; font-size:14px; line-height:17px; margin-bottom:0; margin-top:8px; overflow:hidden; padding:8px 0 7px; text-align:center; text-overflow:ellipsis; white-space:nowrap;\"><a href=\"https:\/\/www.instagram.com\/p\/BqllapvhYwQ\/?utm_source=ig_embed&amp;utm_campaign=loading\" style=\" color:#c9c8cd; font-family:Arial,sans-serif; font-size:14px; font-style:normal; font-weight:normal; line-height:17px; text-decoration:none;\" target=\"_blank\">A post shared by The Museum of Telephony (Archived) (@clickfordsmuseumoftelephony)<\/a><\/p>\n<\/div>\n<\/blockquote>\n<p><script async src=\"\/\/platform.instagram.com\/en_US\/embeds.js\"><\/script><\/p>\n<p>The phone posted above is a Rolmphone 312. This set came later in Rolm&#8217;s life, I believe shortly after Siemens took over. These were typically seen on later 9751 systems, running newer software such as version 9006i. The 9751 had 3 major software variants: 9005, 9006m and 9006i. The systems running 9005 and 9006m had Motorola processors and were similar in operation to the model 8000 and 9000 CBX&#8217;s. The 9751&#8217;s running 9006i had Intel processors. The software on these was completely re-written was more or less a Siemens HiCom system. The pictured above was not on a Redwood (it only supported 100\/200\/400 series Rolmphones) nor a 9200 CBX (the 9200 was a re-branded Siemens system and used Siemens phones). More than likely, the system the phone in your picture was connected to was a 9751 running 9006i software.<\/p>\n<figure id=\"attachment_3704\" aria-describedby=\"caption-attachment-3704\" style=\"width: 525px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/themuseumoftelephony.files.wordpress.com\/2019\/07\/outlook-4ikpugqq.png\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-3704\" src=\"https:\/\/themuseumoftelephony.files.wordpress.com\/2019\/07\/outlook-4ikpugqq.png\" alt=\"a picture of an IBM branded ROLM black colored digital telephone for the Redwood phone system\" width=\"525\" height=\"700\" srcset=\"https:\/\/clickford.net\/telephony\/wp-content\/uploads\/2019\/07\/outlook-4ikpugqq.png 525w, https:\/\/clickford.net\/telephony\/wp-content\/uploads\/2019\/07\/outlook-4ikpugqq-225x300.png 225w\" sizes=\"auto, (max-width: 525px) 100vw, 525px\" \/><\/a><figcaption id=\"caption-attachment-3704\" class=\"wp-caption-text\">Burgundy IBM? A Redwood telephone that was mimicked to look like it was tied to a full fledged ROLM PBX<\/figcaption><\/figure>\n<p>&nbsp;<\/p>\n<figure id=\"attachment_3703\" aria-describedby=\"caption-attachment-3703\" style=\"width: 593px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/themuseumoftelephony.files.wordpress.com\/2019\/07\/inkedimg_1820_li.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-3703\" src=\"https:\/\/themuseumoftelephony.files.wordpress.com\/2019\/07\/inkedimg_1820_li.jpg?w=593\" alt=\"a picture from Andy of a ROLM digital telephone from the mid to late 1980s\" width=\"593\" height=\"791\" \/><\/a><figcaption id=\"caption-attachment-3703\" class=\"wp-caption-text\">A standard looking ROLM telephone from the mid 1980s to even today at some sites.<\/figcaption><\/figure>\n<p>The 100\/200\/400 series digital phones, like the ones in my pictures were mostly backwards compatible. Rolm didn&#8217;t begin manufacturing digital phone sets until late 1982\/1983&#8211;after the model 8000 CBX was released. You could purchase digital line cards for an existing 8000 CBX, thus allowing it to use the new digital phones. The 7000 CBX (the original CBX) never supported digital phones.<\/p>\n<p>#<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I promise when we move to the big leagues away from WordPress, I&#8217;ll have a broader palette on subject matters! Meaning I can set the content and forget it! A follow up from yesterday&#8217;s post from Andy in Missouri had&hellip;  <\/p>\n<p class=\"more-link\"><a href=\"https:\/\/clickford.net\/telephony\/follow-up-a-brief-history-to-the-rolm-pbx-2\/\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1038],"tags":[410,782,796,797,799,800],"class_list":["post-3702","post","type-post","status-publish","format-standard","hentry","category-guest-posts","tag-follow-up","tag-redwood","tag-rolm","tag-rolm-redwood","tag-rolmphone","tag-rolmset"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/posts\/3702","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/comments?post=3702"}],"version-history":[{"count":1,"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/posts\/3702\/revisions"}],"predecessor-version":[{"id":7262,"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/posts\/3702\/revisions\/7262"}],"wp:attachment":[{"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/media?parent=3702"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/categories?post=3702"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/clickford.net\/telephony\/wp-json\/wp\/v2\/tags?post=3702"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}