{"id":2908,"date":"2018-03-11T12:20:59","date_gmt":"2018-03-11T12:20:59","guid":{"rendered":"http:\/\/headendinfo.com\/?p=2908"},"modified":"2020-03-14T02:49:27","modified_gmt":"2020-03-14T02:49:27","slug":"rs-232-db9-db25","status":"publish","type":"post","link":"https:\/\/headendinfo.com\/rs-232-db9-db25\/","title":{"rendered":"What Is RS-232 Port DB9 DB25 Connector For Headend Equipments"},"content":{"rendered":"\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"200\" data-attachment-id=\"2938\" data-permalink=\"https:\/\/headendinfo.com\/rs-232-db9-db25\/rs-232\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/rs-232.jpg?fit=200%2C200&amp;ssl=1\" data-orig-size=\"200,200\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"rs-232 headend info\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/rs-232.jpg?fit=200%2C200&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/rs-232.jpg?fit=200%2C200&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/rs-232.jpg?resize=200%2C200\" alt=\"rs-232\" class=\"wp-image-2938\" srcset=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/rs-232.jpg?w=200&amp;ssl=1 200w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/rs-232.jpg?resize=65%2C65&amp;ssl=1 65w\" sizes=\"(max-width: 200px) 100vw, 200px\" data-recalc-dims=\"1\" \/><\/figure><\/div>\n\n\n\n<h2 class=\"BWS wp-block-heading\">Introduction<\/h2>\n\n\n\n<p>There are lot of Digital Headend Equipments in which we see RS-232 serial port. These devices are STBs , Decoders and Servers etc. This port can be 3-PIN , 9-PIN and even 25-PIN.<\/p>\n\n\n\n<p>In this article we will cover what is RS-232 port , RS-232 Port working and functions and why it is used. Also its upgraded version.<\/p>\n\n\n\n<h2 class=\"BWS wp-block-heading\">What Is RS-232<\/h2>\n\n\n\n<p style=\"font-size:-8px\"><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"173\" data-attachment-id=\"2921\" data-permalink=\"https:\/\/headendinfo.com\/rs-232-db9-db25\/rs232-9pin-male\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.png?fit=971%2C561&amp;ssl=1\" data-orig-size=\"971,561\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"RS422 9PIN MALE\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.png?fit=300%2C173&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.png?fit=770%2C445&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.png?resize=300%2C173\" alt=\"RS232 9PIN MALE CONNECTOR\" class=\"wp-image-2921\" srcset=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.png?resize=300%2C173&amp;ssl=1 300w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.png?resize=768%2C444&amp;ssl=1 768w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.png?resize=816%2C471&amp;ssl=1 816w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.png?w=971&amp;ssl=1 971w\" sizes=\"(max-width: 300px) 100vw, 300px\" data-recalc-dims=\"1\" \/><\/figure><\/div>\n\n\n\n<p><strong>RS-232<\/strong> is a standard was introduced in 1960. It is used for transmission of data by serial communication. It defines the connection between DTE and DCE. <strong>DTE<\/strong> stands for <strong>Data Terminal Equipment<\/strong> while <strong>DCE<\/strong> stands for <strong>Data Communication Equipment<\/strong>. Where Data Terminal Equipemnt can be Computer and Data Communication Equipment can be Modem, printer and Set Top Box.<\/p><div class=\"bba6f1db18961c49ef4d9557fa67f690\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-2973621680462010\"\r\n     crossorigin=\"anonymous\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2973621680462010\"\r\n     data-ad-slot=\"4191203823\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n\n\n\n<p>RS232 cable length can be maximum of 15 meter or 50ft. It has lower data transmission speed. While other standards like RS 422 , RS 485 and Ethernet have higher data transmission speed.<\/p>\n\n\n\n<p>There are basically two types of <strong>RS-232 Ports<\/strong> like <strong>9-PIN RS-232 Port<\/strong> and <strong>25-PIN RS-232 Port<\/strong>. The 9-PIN RS232 connector is known as <strong>DB9 Connector<\/strong> while 25-PIN RS232 connector is known as <strong>DB25 connector<\/strong>.<\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"http:\/\/headendinfo.com\/store\" target=\"_blank\" rel=\"noreferrer noopener\"><img loading=\"lazy\" decoding=\"async\" width=\"770\" height=\"637\" data-attachment-id=\"8862\" data-permalink=\"https:\/\/headendinfo.com\/stb-release-upgrade-backup\/rs-232-cable-for-stb\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?fit=1775%2C1469&amp;ssl=1\" data-orig-size=\"1775,1469\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;2.2&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;PRIV&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1552218861&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;4.75&quot;,&quot;iso&quot;:&quot;50&quot;,&quot;shutter_speed&quot;:&quot;0.000689179875948&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"rs 232 cable for stb\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;3 PIN RS232 To 9 PIN RS 232 Cable&lt;\/p&gt;\n\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?fit=300%2C248&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?fit=770%2C637&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?resize=770%2C637\" alt=\"buy now rs232 port 3 pin to 9 pin cable for stb software upgrade\" class=\"wp-image-8862\" srcset=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?resize=1024%2C847&amp;ssl=1 1024w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?resize=300%2C248&amp;ssl=1 300w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?resize=768%2C636&amp;ssl=1 768w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?resize=604%2C500&amp;ssl=1 604w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?w=1775&amp;ssl=1 1775w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2019\/03\/rs-232-cable-for-stb.jpg?w=1540 1540w\" sizes=\"(max-width: 770px) 100vw, 770px\" data-recalc-dims=\"1\" \/><\/a><figcaption><strong>3 PIN RS232 To 9 PIN RS 232 Cable<\/strong><\/figcaption><\/figure><\/div>\n\n\n\n<h2 class=\"BWS wp-block-heading\">How Does RS-232 Works ?<\/h2>\n\n\n\n<p style=\"font-size:-8px\"><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"770\" height=\"208\" data-attachment-id=\"2923\" data-permalink=\"https:\/\/headendinfo.com\/rs-232-db9-db25\/rs232-9pin-male-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.jpg?fit=1030%2C278&amp;ssl=1\" data-orig-size=\"1030,278\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"male female rs232\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.jpg?fit=300%2C81&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.jpg?fit=770%2C208&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.jpg?resize=770%2C208\" alt=\"male female rs232 \" class=\"wp-image-2923\" srcset=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.jpg?w=1030&amp;ssl=1 1030w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.jpg?resize=300%2C81&amp;ssl=1 300w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.jpg?resize=768%2C207&amp;ssl=1 768w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.jpg?resize=1024%2C276&amp;ssl=1 1024w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/RS232-9PIN-MALE.jpg?resize=816%2C220&amp;ssl=1 816w\" sizes=\"(max-width: 770px) 100vw, 770px\" data-recalc-dims=\"1\" \/><\/figure><\/div>\n\n\n\n<p>As shown above in the figure there is <strong>5 PIN RS232 Connectors<\/strong> male and female both. The sequence of PIN numbers is mentioned above in diagram.&nbsp; Each of this PIN is responsible for different function.<\/p>\n\n\n\n<p>Let us now understand the functions of 5 PIN Male RS232 Connector,<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"\"><tbody><tr><td>\n<h5><strong>PIN Number<\/strong><\/h5>\n<\/td><td>\n<h5><strong>SIGN<\/strong><\/h5>\n<\/td><td>\n<h5><strong>Signal<\/strong><\/h5>\n<\/td><td>\n<h5><strong>DTE&nbsp; (Computer)<\/strong><\/h5>\n<\/td><\/tr><tr><td>1<\/td><td>DCD<\/td><td>Data Carrier Detect<\/td><td>Input<\/td><\/tr><tr><td>2<\/td><td>RXD<\/td><td>Received Data<\/td><td>Input<\/td><\/tr><tr><td>3<\/td><td>TXD<\/td><td>Transmitted Data<\/td><td>Output<\/td><\/tr><tr><td>4<\/td><td>DTR<\/td><td>Data Terminal Ready<\/td><td>Output<\/td><\/tr><tr><td>5<\/td><td>GND<\/td><td>Ground<\/td><td>&#8211;<\/td><\/tr><tr><td>6<\/td><td>DSR<\/td><td>Data Set Ready<\/td><td>Input<\/td><\/tr><tr><td>7<\/td><td>RTS<\/td><td>Request To Send<\/td><td>Output<\/td><\/tr><tr><td>8<\/td><td>CTS<\/td><td>Clear To Send<\/td><td>Input<\/td><\/tr><tr><td>9<\/td><td>RI<\/td><td>Ring Indicator<\/td><td>Input<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>PIN number 1, 2 and 3 are very important PINs because 1 is used to detect the data carrier . 2 is used to receive the data while 3 is used for transmission of data.<\/p>\n\n\n\n<p>Lets have a look at functions of <strong>25-PIN RS-232 Connector,<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"770\" height=\"646\" data-attachment-id=\"2932\" data-permalink=\"https:\/\/headendinfo.com\/rs-232-db9-db25\/25-pin-rs232\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/25-pin-rs232.jpg?fit=806%2C676&amp;ssl=1\" data-orig-size=\"806,676\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"25 pin rs232\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/25-pin-rs232.jpg?fit=300%2C252&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/25-pin-rs232.jpg?fit=770%2C646&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/25-pin-rs232.jpg?resize=770%2C646\" alt=\"25 pin rs232\" class=\"wp-image-2932\" srcset=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/25-pin-rs232.jpg?w=806&amp;ssl=1 806w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/25-pin-rs232.jpg?resize=300%2C252&amp;ssl=1 300w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/25-pin-rs232.jpg?resize=768%2C644&amp;ssl=1 768w, https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2018\/03\/25-pin-rs232.jpg?resize=596%2C500&amp;ssl=1 596w\" sizes=\"(max-width: 770px) 100vw, 770px\" data-recalc-dims=\"1\" \/><\/figure>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><a href=\"http:\/\/headendinfo.com\/headend-info-books\/\" target=\"_blank\" rel=\"noopener noreferrer\"><img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"150\" data-attachment-id=\"3315\" data-permalink=\"https:\/\/headendinfo.com\/ott-over-the-top\/final-headend-info-book\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/09\/final-headend-info-book.jpg?fit=300%2C150&amp;ssl=1\" data-orig-size=\"300,150\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;}\" data-image-title=\"final headend info book\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/09\/final-headend-info-book.jpg?fit=300%2C150&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/09\/final-headend-info-book.jpg?fit=300%2C150&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/09\/final-headend-info-book.jpg?resize=300%2C150\" alt=\"headend info book download\" class=\"wp-image-3315\" data-recalc-dims=\"1\"\/><\/a><\/figure><\/div>\n\n\n\n<h2 class=\"BWS wp-block-heading\">What Are Applications Of RS 232 ?<\/h2>\n\n\n\n<p>It is used in connecting printer to computer<\/p>\n\n\n\n<p>It is used in Connecting monitor to CPU.<\/p>\n\n\n\n<p>It is used in connecting Set Top Box with Computer to download the new software , firmware or release in STB. Generally we see 3-PIN RS 232 slot in STBs to connect with Computer. For this reason we need to use cable mentioned below,<\/p>\n\n\n\n<p>as you can see in the image 3 pin RS232 will connect in the STB while other port will connect directly into the PC. If in case your PC is not having this 5-PIN RS232 port jack then you need to purchase 5-PIN male RS232 to USB cable.<\/p>\n\n\n\n<h2 class=\"BWS wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>A 9-PIN RS232 cable is generally used in connecting switches, STBs, printers and monitors to computer or servers. Technically its cable length depends upon the baud rate. Now a days USB to RS232 cable are used to connect old devices to PC. A USB port have removed the use of RS232 port.<\/p>\n\n\n\n<h2 class=\"info wp-block-heading\">Know More About <span style=\"color: #3366ff;\"><a style=\"color: #3366ff;\" href=\"http:\/\/headendinfo.com\/hdmi-sdi-difference-headend\/\" target=\"_blank\" rel=\"noopener noreferrer\">SDI HDMI Difference<\/a><\/span><\/h2>\n\n\n\n<p>reference : <a href=\"https:\/\/www.itu.int\/rec\/T-REC-V.11\/en\" target=\"_blank\" rel=\"noopener nofollow noreferrer\">itu<\/a><\/p>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter\"><img loading=\"lazy\" decoding=\"async\" width=\"118\" height=\"128\" data-attachment-id=\"1432\" data-permalink=\"https:\/\/headendinfo.com\/hd-encoder-digital-headend-system\/headend-info-logo-dark-small-1\/\" data-orig-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/08\/Headend-INFO-Logo-Dark-SMALL-1.png?fit=118%2C128&amp;ssl=1\" data-orig-size=\"118,128\" data-comments-opened=\"1\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Headend INFO Logo Dark SMALL 1\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/08\/Headend-INFO-Logo-Dark-SMALL-1.png?fit=118%2C128&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/08\/Headend-INFO-Logo-Dark-SMALL-1.png?fit=118%2C128&amp;ssl=1\" src=\"https:\/\/i0.wp.com\/headendinfo.com\/wp-content\/uploads\/2017\/08\/Headend-INFO-Logo-Dark-SMALL-1.png?resize=118%2C128\" alt=\"headend info\" class=\"wp-image-1432\" data-recalc-dims=\"1\"\/><\/figure><\/div>\n\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction There are lot of Digital Headend Equipments in which we see RS-232 serial port. These devices are STBs , Decoders and Servers etc. This port can be 3-PIN , 9-PIN and even 25-PIN. In this article we will cover what is RS-232 port , RS-232 Port working and functions and why it is used. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2938,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"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":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[9],"tags":[217],"jetpack_publicize_connections":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>RS-232 PORT DB9 DB25 CONNECTOR FOR HEADEND EQUIPMENTS<\/title>\n<meta name=\"description\" content=\"RS-232 is a standard was introduced in 1960. It is used for transmission of data by serial communication. It defines the connection between DTE and DCE. DTE\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/headendinfo.com\/rs-232-db9-db25\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"RS-232 PORT DB9 DB25 CONNECTOR FOR HEADEND EQUIPMENTS\" \/>\n<meta property=\"og:description\" content=\"RS-232 is a standard was introduced in 1960. It is used for transmission of data by serial communication. It defines the connection between DTE and DCE. 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