{"id":94,"date":"2019-06-05T09:00:00","date_gmt":"2019-06-05T14:00:00","guid":{"rendered":"https:\/\/packitforwarding.com\/index.php\/2012\/01\/19\/telephony-basics-pt-2\/"},"modified":"2019-06-02T11:51:47","modified_gmt":"2019-06-02T16:51:47","slug":"telephony-basics-pt-2","status":"publish","type":"post","link":"https:\/\/packitforwarding.com\/index.php\/2019\/06\/05\/telephony-basics-pt-2\/","title":{"rendered":"Telephony Basics Pt 2"},"content":{"rendered":"\n<p><em>This post was originally published January 19, 2012 on my old blog.<\/em><\/p>\n\n\n\n<p>Telephony is definitely not an area for the color blind. &nbsp;Telephone cables and wires are all color coded to help with pair identification.<\/p>\n\n\n\n<p>Mainly in older installations you will find the Bell Company solid color code which was as follows:<\/p>\n\n\n\n<table class=\"wp-block-table has-subtle-pale-blue-background-color has-background is-style-regular\"><tbody><tr><td>Pair One<\/td><td>Green<\/td><td>Red<\/td><\/tr><tr><td>Pair Two<\/td><td>Black<\/td><td>Yellow<\/td><\/tr><tr><td>Pair Three<\/td><td>White<\/td><td>Blue<\/td><\/tr><\/tbody><\/table>\n\n\n\n<p>This scheme did continue for larger numbers of pairs, but it is rare to see any cables with more than three pair left in service.<\/p>\n\n\n\n<p>The modern scheme uses a repeated combination of a group color with a pair color. &nbsp;The group and pair colors are:<\/p>\n\n\n\n<table class=\"wp-block-table has-subtle-pale-blue-background-color has-background\"><tbody><tr><td>Group<\/td><td>Pair<\/td><\/tr><tr><td>White<\/td><td>Blue<\/td><\/tr><tr><td>Red<\/td><td>Orange<\/td><\/tr><tr><td>Black<\/td><td>Green<\/td><\/tr><tr><td>Yellow<\/td><td>Brown<\/td><\/tr><tr><td>Violet<\/td><td>Slate<\/td><\/tr><\/tbody><\/table>\n\n\n\n<p>So using the group and pair colors, the first group of pairs will all have white matched with a color. Usually, the white wire has a tracer of the pair color to help with identification in case the cables become unwound. Using these colors, you can uniquely identify 25 pairs. Because the 25 pair cable and related termination on punch down blocks and other terminations are quite common, I have listed out the entire cable pair color chart below.<\/p>\n\n\n\n<div>\n<table style=\"float: right; margin-left: 1em; text-align: right;\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td style=\"text-align: center;\"><figure><a style=\"clear: right; margin-bottom: 1em; margin-left: auto; margin-right: auto;\" href=\"http:\/\/upload.wikimedia.org\/wikipedia\/commons\/3\/35\/25_pair_color_code_chart.svg\"><img decoding=\"async\" src=\"http:\/\/upload.wikimedia.org\/wikipedia\/commons\/3\/35\/25_pair_color_code_chart.svg\" border=\"0\"><\/a><\/figure><\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center;\">25 Pair Color Code from Wikipedia<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<\/div>\n\n\n\n<table class=\"wp-block-table has-subtle-pale-blue-background-color has-background\"><tbody><tr><th>Pair #<\/th><th>First wire<\/th><th>Second wire<\/th><\/tr><tr><td>1<\/td><td>White<\/td><td>Blue<\/td><\/tr><tr><td>2<\/td><td>Orange<\/td><\/tr><tr><td>3<\/td><td>Green<\/td><\/tr><tr><td>4<\/td><td>Brown<\/td><\/tr><tr><td>5<\/td><td>Slate<\/td><\/tr><tr><td>6<\/td><td>Red<\/td><td>Blue<\/td><\/tr><tr><td>7<\/td><td>Orange<\/td><\/tr><tr><td>8<\/td><td>Green<\/td><\/tr><tr><td>9<\/td><td>Brown<\/td><\/tr><tr><td>10<\/td><td>Slate<\/td><\/tr><tr><td>11<\/td><td>Black<\/td><td>Blue<\/td><\/tr><tr><td>12<\/td><td>Orange<\/td><\/tr><tr><td>13<\/td><td>Green<\/td><\/tr><tr><td>14<\/td><td>Brown<\/td><\/tr><tr><td>15<\/td><td>Slate<\/td><\/tr><tr><td>16<\/td><td>Yellow<\/td><td>Blue<\/td><\/tr><tr><td>17<\/td><td>Orange<\/td><\/tr><tr><td>18<\/td><td>Green<\/td><\/tr><tr><td>19<\/td><td>Brown<\/td><\/tr><tr><td>20<\/td><td>Slate<\/td><\/tr><tr><td>21<\/td><td>Violet<\/td><td>Blue<\/td><\/tr><tr><td>22<\/td><td>Orange<\/td><\/tr><tr><td>23<\/td><td>Green<\/td><\/tr><tr><td>24<\/td><td>Brown<\/td><\/tr><tr><td>25<\/td><td>Slate<\/td><\/tr><\/tbody><\/table>\n\n\n\n<p>Once you go past 25 pairs, the pattern repeats by using colored ribbons called binders to wrap each set of 25 pairs. &nbsp;So the first set would be wrapped in white and blue ribbons, the next white and orange and so on.<\/p>\n\n\n\n<p>In networking, we&#8217;ve adopted the same color code for Ethernet cabling, but with only 4 pairs we only use part of the color scheme. \u00a0The Ethernet TIA586A and TIA586B standards define two different ways to terminate an Ethernet cable into an RJ-45 or an 8p8c connector. \u00a0Most use the B standard which places pair one (white\/blue) in pins 4 and 5 which corresponds to line one in telephony. \u00a0Line two which is pins 3 and 6 is pair 3 (white\/green). \u00a0TIA586A, on the other hand, puts pair 2(white\/orange) in the pins 3 and 6. \u00a0This allows the termination to correspond to telephony line 2. \u00a0Mostly this is just knowledge to have for reference, but you may run across TIA586A in the wild.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>This post was originally published January 19, 2012 on my old blog. Telephony is definitely not an area for the color blind. &nbsp;Telephone cables and wires are all color coded to help with pair identification. Mainly in older installations you will find the Bell Company solid color code which was as follows: Pair One Green [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":651,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[88,63,115,51,25],"tags":[116],"class_list":["post-94","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-pots","category-recycled-blog-posts","category-telephony","category-tools","tag-telephony"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Telephony Basics Pt 2 -<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/packitforwarding.com\/index.php\/2019\/06\/05\/telephony-basics-pt-2\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Telephony Basics Pt 2 -\" \/>\n<meta property=\"og:description\" content=\"This post was originally published January 19, 2012 on my old blog. 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In previous posts, I've explained terminology, color coding, and how to trace cables. \u00a0Now it's time to actually connect something. \u00a0As I showed in the first post of this series, there are two styles of punch down blocks\u2026","rel":"","context":"In &quot;Blog&quot;","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/06\/110-block.jpg?fit=1200%2C900&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/06\/110-block.jpg?fit=1200%2C900&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/06\/110-block.jpg?fit=1200%2C900&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/06\/110-block.jpg?fit=1200%2C900&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/06\/110-block.jpg?fit=1200%2C900&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":93,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/06\/07\/telephony-basics-pt-3\/","url_meta":{"origin":94,"position":1},"title":"Telephony Basics Pt 3","author":"Ben Story","date":"June 7, 2019","format":false,"excerpt":"This article was originally posted to my old blog on January 23, 2012. One of the first things that I learned in my foray into the world of telephony was how to effectively use a cable toner. \u00a0Although I had used a toner before to trace network cabling, it was\u2026","rel":"","context":"In &quot;Blog&quot;","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2012\/01\/cablemess.jpg?fit=580%2C435&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2012\/01\/cablemess.jpg?fit=580%2C435&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2012\/01\/cablemess.jpg?fit=580%2C435&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":96,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/06\/03\/telephony-basics-part-1\/","url_meta":{"origin":94,"position":2},"title":"Telephony Basics Part 1","author":"Ben Story","date":"June 3, 2019","format":false,"excerpt":"This is the first of a multipart series of articles on Telephony from my old blog that I've decided to recycle. 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My last post generated a lot of comments about what I would call traditional telephony or what VoIP (IPT) installers refer to\u2026","rel":"","context":"In &quot;Blog&quot;","block_context":{"text":"Blog","link":"https:\/\/packitforwarding.com\/index.php\/category\/blog\/"},"img":{"alt_text":"communication","src":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/01\/marketing-man-person-communication.jpg?fit=640%2C426&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/01\/marketing-man-person-communication.jpg?fit=640%2C426&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/packitforwarding.com\/wp-content\/uploads\/2019\/01\/marketing-man-person-communication.jpg?fit=640%2C426&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":68,"url":"https:\/\/packitforwarding.com\/index.php\/2019\/05\/13\/how-to-waste-an-entire-day-troubleshooting-one-phone-and-then-fix-it-in-less-than-5-seconds\/","url_meta":{"origin":94,"position":3},"title":"How to Waste an Entire Day Troubleshooting One Phone&#8230; and Then Fix It in Less Than 5 Seconds","author":"Ben Story","date":"May 13, 2019","format":false,"excerpt":"This article was originally posted on July 8th, 2013 to my old blog. 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