{"product_id":"cisco-ip-phone-8851-cp-8851-k9-new-bluetooth-enterprise-ip-phone","title":"Cisco IP Phone 8851, CP-8851-K9 — New, Bluetooth Enterprise IP Phone","description":"\u003cp\u003eThe \u003cstrong\u003eCisco IP Phone 8851 CP-8851-K9\u003c\/strong\u003e is a brand-new, standard enterprise desk phone built for Cisco Unified Communications Manager (Unified CM \/ Call Manager) environments. It features a 5-inch color display, five programmable line keys, Bluetooth for wireless headsets, and dual Gigabit Ethernet ports with PoE, so no external power is needed. It ships with Cisco's Unified CM (Enterprise) firmware and registers directly to a Cisco Unified Communications Manager cluster over SIP.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e5\" backlit color LCD (800 x 480) widescreen VGA display\u003c\/li\u003e\n\u003cli\u003e5 programmable line keys for Cisco Unified Communications Manager registration, expandable up to 66 lines with two Key Expansion Modules\u003c\/li\u003e\n\u003cli\u003eBluetooth 3.0 EDR Class 1 for wireless headset pairing (up to 66 ft range)\u003c\/li\u003e\n\u003cli\u003eSide-mounted USB port for wired\/wireless headsets and device charging (up to 500 mA)\u003c\/li\u003e\n\u003cli\u003eDual Gigabit Ethernet ports (network + PC passthrough) with PoE, no external power needed\u003c\/li\u003e\n\u003cli\u003eFull-duplex speakerphone with wideband audio\u003c\/li\u003e\n\u003cli\u003eHearing Aid Compatible (HAC) handset, ADA and Section 508 compliant\u003c\/li\u003e\n\u003cli\u003eBroad audio codec support: G.711, G.722, G.722.2, G.729ab, iLBC, Opus\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Cisco CP-8851-K9 (IP Phone 8851, Unified CM \/ Enterprise Firmware)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e Charcoal\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 5\" color LCD, 800 x 480\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnectivity:\u003c\/strong\u003e 2x Gigabit Ethernet (RJ45), Bluetooth 3.0 EDR Class 1; no Wi-Fi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUSB:\u003c\/strong\u003e 1x USB port (headset \/ charging)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower:\u003c\/strong\u003e PoE IEEE 802.3af\/at; optional AC adapter (sold separately)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCall control platform:\u003c\/strong\u003e Cisco Unified Communications Manager (Unified CM \/ Call Manager) only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSignaling protocol:\u003c\/strong\u003e SIP (registers to Cisco Unified CM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLines:\u003c\/strong\u003e 5 programmable line keys, expandable to up to 66 lines with two Key Expansion Modules\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePorts:\u003c\/strong\u003e 1x RJ9 handset, 1x RJ9 headset, 1x USB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions\/Weight:\u003c\/strong\u003e 9.02 x 10.13 x 1.57 in.; 2.62 lb with handset\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cp\u003eDesk phone, handset, handset cable, dual-position stand, Ethernet cable, and quick-start guide. AC power adapter not included.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Cisco CP-8851-K9 compatible with Webex Calling, BroadWorks, or Asterisk?\u003c\/strong\u003e\u003cbr\u003eNo. This unit ships with Cisco's Unified CM (Enterprise) firmware, which registers only to Cisco Unified Communications Manager (Call Manager). Webex Calling, BroadWorks, and third-party SIP platforms require the separate multiplatform (3PCC) firmware variant.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the Cisco 8851 support Wi-Fi and Bluetooth?\u003c\/strong\u003e\u003cbr\u003eIt supports Bluetooth 3.0 EDR Class 1 for pairing wireless headsets, but it does not support Wi-Fi — it connects to the network over wired dual Gigabit Ethernet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's the difference between the 8851 and the 8841?\u003c\/strong\u003e\u003cbr\u003eThe 8851 adds Bluetooth for wireless headsets and a side-mounted USB port for headset connectivity and charging, plus support for up to two Key Expansion Modules (66 lines total) versus the 8841's baseline 5 lines with no Bluetooth or USB.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the Cisco 8851 phone require a separate power adapter?\u003c\/strong\u003e\u003cbr\u003eNo. It supports Power over Ethernet (802.3af\/at), so it can be powered directly through a PoE switch. An AC adapter is available separately if PoE isn't an option.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this unit new or refurbished?\u003c\/strong\u003e\u003cbr\u003eThis Cisco CP-8851-K9 is brand new, factory-sealed stock.\u003c\/p\u003e","brand":"Resilient Tec","offers":[{"title":"Default Title","offer_id":48997896650852,"sku":"CP-8851-K9","price":249.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0767\/3482\/4548\/files\/Screenshot2026-08-14124411_f4d829b5-d0b9-42d5-ab3c-6d7367fdf01b.png?v=1786726231","url":"https:\/\/resilient-tec.com\/products\/cisco-ip-phone-8851-cp-8851-k9-new-bluetooth-enterprise-ip-phone","provider":"Resilient Tec","version":"1.0","type":"link"}