Cisco 6851


An affordable desk phone with the essential features to improve your organization’s person-to-person communication.

Product details
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Shipping: 5.07 €
1-3 business day delivery
Cisco 6851
  / month
Monthly payment One time payment
Fast and free delivery in 1-3 business days
Fair and easy returns during rental period
Simply pay by credit card
Product details
Enterprise-level communication. Thanks to an affordable, everyday desktop phone.

The modern workplace requires efficient and high-quality communication channels. These should reflect the professionalism of the company. The Cisco 6851 provides an enterprise-level communication and connection for modern companies. At an attractive price.

Because the impression of your company on the phone matters.

The Cisco 6851 supports a narrowband or wideband audio handset connected through an RJ-9 port. It provides an exceptional noise isolation when used with a Cisco Headset or the optional enhanced wideband audio handset - for an excellent audio quality.

Efficient. Flexible. Easy-to-use.

The white backlit, grayscale display allows an easy use. For a traditional telephony-like user experience at best quality. An easy navigation boosts productivity. A full-duplex speakerphone gives you flexibility in placing and receiving calls with your hands free. 

A design that fits your needs. Flexibility meets ergonomics.

The foot stand holds the phone in a single position, making the display easy to view and the buttons easy to use while sitting down. You can remove the foot stand for wall mounting. 

An excellent workflow. Thanks to features, that make work easier and more efficient.

Modern telephony features improve your working experience by allowing an efficient call management and configuration. For easy call and audio control.

Technical details

Full lines supported
4 lines (SIP registrations)
Audio features
  • Codecs: G.711 (A-law and m-law), G.722.2, G.722, G.729 (a, b, ab), ILBC, iSAC, OPUS
  • DTMF: In-band, out-of-band (RFC 2833), and SIP INFO
  • MOS Score Reporting (Telchemy)
  • The 6800 series provides exceptional noise isolation when used with a Cisco Headset.
  • Supports either a narrowband or a wideband audio handset connected through an RJ-9 port.
  • A full-duplex speakerphone gives you flexibility in placing and receiving calls. For added security, the Audible Dual-Tone Multi-frequency (DTMF) tones are masked when the speakerphone mode is used. 
  • A volume-control toggle provides easy decibel-level adjustments of the handset, monitor speaker, and ringer.
Telephony features
  • Busy Lamp Field (BLF)
  • Call back on busy
  • Call blocking – anonymous and selective
  • Call conferencing – hosted (N-party)
  • Call conferencing – local 3-way
  • Call forwarding – unconditional, no answer, on busy
  • Call hold, park and unpark
  • Call park monitoring via the BLF list
  • Call pickup – selective and group
  • Call transfer – attended or blind
  • Call waiting
  • Caller ID mapping for incoming calls
  • Caller ID name and number and outbound caller ID blocking
  • Configurable dial plan and numbering plan support with inter-digit timers – per line
  • Configurable supplementary services soft keys
  • Distinctive ringing based on calling and called number
  • Do not disturb
  • Early Media and Preconditions (Cisco BroadWorks R23 feature support)
  • Extension mobility, hot-desking, hoteling, Activity Based Workspace
  • Group paging 
  • Individual volume setting per audio path (headset, handset, or speaker)
  • Intercom
  • Multicast paging
  • Music on hold
  • Outbound caller ID blocking
  • PLKs: Other than the primary line assignment on the first line key, the other keys may be configured as user-customizable, or system administrator-customizable PLKs
  • Shared line and bridged line appearance 1
  • Supplementary services feature activation codes
  • Visual Voice Message Waiting Indicator (VMWI)
  • Voice Mail Monitoring via a PLK
  • Hold/resume, transfer, and conference
  • Messaging, Directory
Network features
  • Cisco Discovery Protocol
  • DHCP (RFC 2131)
  • DHCP VLAN Options
  • DNS: A record (RFC 1706), SRV record (RFC 2782)
  • Global Discovery Services (GDS)
  • HTTPs Support for XSI Services
  • IPv4 (RFC 791)
  • IPV6 (RFC 2460): System Interoperability Testing Required
  • LLDP
  • MAC address (IEEE 802.3)
  • NAT, (STUN)
  • Peer Firmware Sharing
  • SIP protocol support (RFC 3261 and companion RFCs)
  • SNTP (RFC 2030)
  • TR.69 provisioning: System Interoperability Testing Required
  • UDP and TCP
  • Zero Touch Provisioning
Security features
  • 802.1X authentication
  • Device authentication
  • Encrypted configuration files
  • File authentication
  • Image authentication
  • Manufacture-Installed Certificates
  • Media encryption using SRTP with Advanced Encryption Standard AES-128 or AES-256
  • Signaling encryption using TLS with AES-128 or AES-256
Size (H x W x D)
207 mm x 265 mm x 33 mm (8.2 in x 10.4 in x 1.3 in ) (excluding foot stand)
  • 615 g (22 oz) (excluding foot stand, handset, and package)
  • 682 g (24 oz ) (including foot stand, excluding handset and package)
User interface
White backlit, grayscale, 3.2-in (8.1 cm), 320x120 pixel display

The 6851 has the following keys:
  • Lines
  • Softkeys
  • Two-way navigation and select
  • Service
  • Standard keypads
  • Volume control toggle
  • Speakerphone, headset, and mute
  • Hold/resume, transfer, and conference
  • Messaging, Directory
Cisco applications
  • Cisco Webex Calling
  • Webex Calling Carrier
  • Cisco BroadWorks

  • BroadWorks Anywhere
  • BroadWorks Executives and Assistants
  • BroadWorks XSI Call Logs Display
  • BroadWorks XSI Caller ID Blocking
  • Cisco Problem Reporting Tool (PRT) with local and remote initiation
  • Cisco XML XSI
  • Multicast Paging
  • Remote SDK
  • UC-One Presence
3rd party applications
  • Asterisk
  • Centile
  • Metaswitch
  • Ribbon Kandy Business Solutions 
Language support
Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Finnish, French, Greek, German, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Slovak, Spanish, Swedish, Slovenian, Turkish
Supports the following Ethernet cables:
  • Category 3, 5, 5e, and 6 for 10-Mbps cables with 4 pairs
  • Category 5, 5e, and 6 for 100-Mbps cables with 4 pairs
  • Category 3, 5, 5e, and 6 for 1000-Mbps cables with 4 pairs
  • A 10/100/1000BASE-T Ethernet connection through two RJ-45 ports; one for the LAN connection and the other for a downstream Ethernet device connection such as a PC
  • Interoperable IEEE 802.3af PoE (Class 2) devices. 5V DC is required; they can be supplied locally at the desktop using one of the optional AC-to-DC country-specific power supplies. 
  • CE Markings per directives 2004/108/EC and 2014/30/EU
  • UL 60950 Second Edition
  • CAN/CSA-C22.2 No. 60950 Second Edition
  • EN 60950 Second Edition (including A11 and A12)
  • IEC 60950 Second Edition (including A11 and A12)
  • AS/NZS 60950
EMC – Emissions:
  • 47CFR Part 15 (CFR 47) Class B
  • AS/NZS CISPR32:2015 Class B
  • CISPR 32: 2015_COR1:2016 Class B
  • EN55032: 2015+AC:2016
  • ICES003 Class B
  • EN61000-3-2:2014 and IEC 61000-3-2:2014
  • EN61000-3-3:2013 and IEC61000-3-3:2013
EMC – Immunity:
  • EN55024
  • CISPR24
  • Armadillo Light
  • FCC Part 68 HAC
  • CS-03-HAC
  • AS/ACIF S004 & AS/ACIF S040
  • NZ PTC 220
  • Industry standards: TIA 810 and TIA 920
Industry standards:
  • IEEE 802.3 Ethernet, IEEE 802.3af (for CP-6851 only)
Radio (for CP-6861 only):
  • FCC Part 15
  • EN 300.328
  • EN 301-489-1, EN 301-489-17 & EN 301-489-3
  • NCC LP0002
  • EN 301 893
  • EN 300 330
  • RSP-100-11
  • RSS- Gen, RSS-102, RSS-210 & RSS-247-2
Why Rent?
Cost Effective
Meet your business needs without going overbudget with attractive monthly rates. No hidden costs.
Fully Covered
Receive immediate help and if applicable a hardware replacement in less than 48 hours.
Latest Technology
Have access to best-in-class devices and scale your tech stack the same way your business grows.