{"id":31540,"date":"2026-09-08T03:53:17","date_gmt":"2026-09-08T03:53:17","guid":{"rendered":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/"},"modified":"2026-09-08T03:53:19","modified_gmt":"2026-09-08T03:53:19","slug":"cp-7821-k9-cisco-ip-phone-7821-voip-phone","status":"publish","type":"product","link":"http:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/","title":{"rendered":"cp-7821-k9= Cisco IP Phone 7821 VoIP phone"},"content":{"rendered":"<p>cp-7821-k9= Technical Specifications<\/p>\n<p>Cisco IP Phone 7821 VoIP phone<\/p>\n<p>Brand: Cisco<\/p>\n<p>Product Line: Cisco IP Phone<\/p>\n<p>Model: 7821<\/p>\n<p>Manufacturer: Cisco Systems<\/p>\n<p>Network &#038; Communication<\/p>\n<p>IP Address Assignment: DHCP, Static<\/p>\n<p>IP Telephony Network Ports: 2 x Ethernet 10Base-T\/100Base-TX<\/p>\n<p>Network Features: Lightweight Directory Access Protocol (LDAP)<\/p>\n<p>Network Protocols: Cisco Discovery Protocol (CDP), SRTP<\/p>\n<p>Connectivity<\/p>\n<p>Phone Connections: Headset jack<\/p>\n<p>Display &#038; Graphics<\/p>\n<p>Backlit Display: Yes<\/p>\n<p>Color Support: Monochrome<\/p>\n<p>Display Diagonal Size: 3.5 inch<\/p>\n<p>Display Diagonal Size (metric): 8.9 centimetre<\/p>\n<p>Display Location: Base<\/p>\n<p>Display Resolution: 396 x 162 pixels<\/p>\n<p>Display Type: LCD display<\/p>\n<p>Technical Information<\/p>\n<p>Compatible Platforms: Cisco Business Edition 6000<\/p>\n<p>Multiple Conferencing: Yes<\/p>\n<p>Speakerphone: Yes<\/p>\n<p>Voice Codec: G.711a, G.711u, G.722, G.729ab, iLBC<\/p>\n<p>Product Information<\/p>\n<p>Additional Functions: Call timer<\/p>\n<p>Dialer Location: Base<\/p>\n<p>Lines Supported: 2 lines<\/p>\n","protected":false},"excerpt":{"rendered":"<p>cp-7821-k9= Overview<\/p>\n<p>Deploy reliable and highly secure voice communications with the Cisco IP Phone 7821. This full-featured phone is easy to use and easy on your budget. This endpoint supports wideband audio for superior voice communications quality and advanced IP telephony features to make your business calls more efficient and productive.<\/p>\n","protected":false},"featured_media":31541,"comment_status":"closed","ping_status":"open","template":"","meta":{"_acf_changed":false},"product_brand":[255],"product_cat":[5684,527],"product_tag":[2910,5827,5685,2978],"class_list":["post-31540","product","type-product","status-publish","has-post-thumbnail","product_brand-cisco","product_cat-cisco-phones","product_cat-phones","product_tag-ethernet-switch","product_tag-headset-jack","product_tag-ip-phone","product_tag-wall-mountable","first","instock","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>cp-7821-k9= Cisco IP Phone 7821 VoIP phone - Geek Tech Sol<\/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:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"cp-7821-k9= Cisco IP Phone 7821 VoIP phone - Geek Tech Sol\" \/>\n<meta property=\"og:description\" content=\"cp-7821-k9= Overview Deploy reliable and highly secure voice communications with the Cisco IP Phone 7821. This full-featured phone is easy to use and easy on your budget. This endpoint supports wideband audio for superior voice communications quality and advanced IP telephony features to make your business calls more efficient and productive.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/\" \/>\n<meta property=\"og:site_name\" content=\"Geek Tech Sol\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-08T03:53:19+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/geektechsol.com\/wp-content\/uploads\/2026\/09\/Cisco-cp-7821-k9.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"800\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/geektechsol.com\\\/index.php\\\/product\\\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\\\/\",\"url\":\"https:\\\/\\\/geektechsol.com\\\/index.php\\\/product\\\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\\\/\",\"name\":\"cp-7821-k9= Cisco IP Phone 7821 VoIP phone - Geek Tech Sol\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/geektechsol.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/geektechsol.com\\\/index.php\\\/product\\\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/geektechsol.com\\\/index.php\\\/product\\\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\\\/#primaryimage\"},\"thumbnailUrl\":\"http:\\\/\\\/geektechsol.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/Cisco-cp-7821-k9.jpg\",\"datePublished\":\"2026-09-08T03:53:17+00:00\",\"dateModified\":\"2026-09-08T03:53:19+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/geektechsol.com\\\/index.php\\\/product\\\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/geektechsol.com\\\/index.php\\\/product\\\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/geektechsol.com\\\/index.php\\\/product\\\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\\\/#primaryimage\",\"url\":\"http:\\\/\\\/geektechsol.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/Cisco-cp-7821-k9.jpg\",\"contentUrl\":\"http:\\\/\\\/geektechsol.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/Cisco-cp-7821-k9.jpg\",\"width\":800,\"height\":800},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/geektechsol.com\\\/index.php\\\/product\\\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/geektechsol.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Shop\",\"item\":\"https:\\\/\\\/geektechsol.com\\\/index.php\\\/shop\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"cp-7821-k9= Cisco IP Phone 7821 VoIP phone\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/geektechsol.com\\\/#website\",\"url\":\"https:\\\/\\\/geektechsol.com\\\/\",\"name\":\"Geek Tech Sol\",\"description\":\"\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/geektechsol.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"cp-7821-k9= Cisco IP Phone 7821 VoIP phone - Geek Tech Sol","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/","og_locale":"en_US","og_type":"article","og_title":"cp-7821-k9= Cisco IP Phone 7821 VoIP phone - Geek Tech Sol","og_description":"cp-7821-k9= Overview Deploy reliable and highly secure voice communications with the Cisco IP Phone 7821. This full-featured phone is easy to use and easy on your budget. This endpoint supports wideband audio for superior voice communications quality and advanced IP telephony features to make your business calls more efficient and productive.","og_url":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/","og_site_name":"Geek Tech Sol","article_modified_time":"2026-09-08T03:53:19+00:00","og_image":[{"width":800,"height":800,"url":"http:\/\/geektechsol.com\/wp-content\/uploads\/2026\/09\/Cisco-cp-7821-k9.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/","url":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/","name":"cp-7821-k9= Cisco IP Phone 7821 VoIP phone - Geek Tech Sol","isPartOf":{"@id":"https:\/\/geektechsol.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/#primaryimage"},"image":{"@id":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/#primaryimage"},"thumbnailUrl":"http:\/\/geektechsol.com\/wp-content\/uploads\/2026\/09\/Cisco-cp-7821-k9.jpg","datePublished":"2026-09-08T03:53:17+00:00","dateModified":"2026-09-08T03:53:19+00:00","breadcrumb":{"@id":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/#primaryimage","url":"http:\/\/geektechsol.com\/wp-content\/uploads\/2026\/09\/Cisco-cp-7821-k9.jpg","contentUrl":"http:\/\/geektechsol.com\/wp-content\/uploads\/2026\/09\/Cisco-cp-7821-k9.jpg","width":800,"height":800},{"@type":"BreadcrumbList","@id":"https:\/\/geektechsol.com\/index.php\/product\/cp-7821-k9-cisco-ip-phone-7821-voip-phone\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/geektechsol.com\/"},{"@type":"ListItem","position":2,"name":"Shop","item":"https:\/\/geektechsol.com\/index.php\/shop\/"},{"@type":"ListItem","position":3,"name":"cp-7821-k9= Cisco IP Phone 7821 VoIP phone"}]},{"@type":"WebSite","@id":"https:\/\/geektechsol.com\/#website","url":"https:\/\/geektechsol.com\/","name":"Geek Tech Sol","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/geektechsol.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"http:\/\/geektechsol.com\/index.php\/wp-json\/wp\/v2\/product\/31540","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/geektechsol.com\/index.php\/wp-json\/wp\/v2\/product"}],"about":[{"href":"http:\/\/geektechsol.com\/index.php\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"http:\/\/geektechsol.com\/index.php\/wp-json\/wp\/v2\/comments?post=31540"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/geektechsol.com\/index.php\/wp-json\/wp\/v2\/media\/31541"}],"wp:attachment":[{"href":"http:\/\/geektechsol.com\/index.php\/wp-json\/wp\/v2\/media?parent=31540"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"http:\/\/geektechsol.com\/index.php\/wp-json\/wp\/v2\/product_brand?post=31540"},{"taxonomy":"product_cat","embeddable":true,"href":"http:\/\/geektechsol.com\/index.php\/wp-json\/wp\/v2\/product_cat?post=31540"},{"taxonomy":"product_tag","embeddable":true,"href":"http:\/\/geektechsol.com\/index.php\/wp-json\/wp\/v2\/product_tag?post=31540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}