Cisco 6851 IP phone Gigabit

The Cisco 6851 IP phone offers an easy to use interface with a traditional telephony user experience, replaces the older Cisco SPA502.

Cisco 6851 IP Phone features

Ergonomic design

• The phones offer an easy-to-use interface and provide a traditional telephony-like user experience.

Graphical display

• White backlit, grayscale, 3.5-in. (9-cm) 396×162-pixel display.
• Scrollable access to calling features and text-based XML applications.

Handset

• The default handset is a standard audio handset (connects through an RJ-9 port). An additional enhanced audio handset is available for purchase.
• The handset is Hearing Aid Compatible (HAC) and meets Federal Communications Commission (FCC) loudness requirements for the Americans with Disabilities Act (ADA). You can meet Section 508 loudness requirements by using industry-standard inline handset amplifiers such as Walker Equipment W-10 or CE100 amplifiers. The dial pad is also ADA compliant.
• The default handset produces a magnetic field that attracts small metallic objects such as pins and staples. To avoid possible injuries, do not keep small metallic objects close to the handset.

Headset

• The analogue headset jack is a standard wideband-capable RJ-9 audio port.

Backlit indicator

• The phone supports backlit indicators for the audio path keys (handset, headset, and speakerphone), select key, line keys, and message waiting.

Volume control

• A volume-control toggle provides easy decibel-level adjustments of the handset, monitor speaker, and ringer.

Full-duplex speakerphone

• A full-duplex speakerphone gives you flexibility in placing and receiving calls. For added security, the audible dual-tone multifrequency (DTMF) tones are masked when the speakerphone mode is used.

Single-position foot stand

• The foot stand holds the phone at an angle, making the display easy to view and the buttons and keys easy to use. You can remove the foot stand for wall mounting, with mounting holes located on the back of the phone.

Wall mountable

• The phone can be installed on a wall using the optional 6800 Series wall-mount kit (available separately).

Electronic hook switch

• The hook switch can be controlled electronically with a third-party headset connected to the auxiliary port for the 6851 model only.

Cisco 6851 IP Phone Keys

• The phones have the following keys:
  • Line keys
  • Soft keys
  • Two-way navigation and select keys
  • Hold/Resume, Transfer, and Conference keys
  • Messaging, Service, and Directory keys
  • Standard key pads
  • Volume control toggle key
  • Speakerphone, headset, and mute keys

Ethernet cables

• Support 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 5, 5e, and 6 for 1000-Mbps cables with 4 pairs

Power features

IEEE PoE Class 2

• The 6851 IP phone supports IEEE 802.3af PoE (Class 2); power consumption does not exceed 6.89W.

Power adapter with country clips

• 6800 Series regional power adapters are available for powering the 6851 IP phone when used in non-PoE deployments.

Cisco power injector

• Compatible with the Cisco Unified IP Phone Power Injector (CP-PWRINJ), and the 6851 model is compatible with the Cisco Aironet® Power Injector (AIR-PWRINJ5=).

Audio

• Codecs: G.711 (A-law and µ-law), G.722.2, G.722, G.729ab, ILBC, iSAC, OPUS
• DTMF: In-band, out-of-band (RFC 2833), and SIP INFO
• MOS Score Reporting (Telchemy)

Network

• MAC address (IEEE 802.3)
• SIP protocol support (RFC 3261 and companion RFCs)
• IPv4 (RFC 791)
• DNS: A record (RFC 1706), SRV record (RFC 2782)
• Dynamic Host Configuration Protocol (DHCP) (RFC 2131)
• Simple Network Time Protocol (SNTP) (RFC 2030)
• Network Address Translation (NAT) traversal, serial tunnel (STUN)
• User Datagram Protocol (UDP) and TCP
• Link Layer Discovery Protocol (LLDP)
• Cisco Discovery Protocol
• TR.69 provisioning

Security

• 802.1X authentication
• Media encryption via Secure Real-Time Transport Protocol (SRTP)
• Transport Layer Security (TLS)
• Encrypted configuration files
• Digest authentication
• Password login
• HTTPs secure provisioning

Applications

• Cisco XML Services Interface (XSI)

Call control and audio 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
• Call pickup – selective and group
• Call park and unpark
• Call transfer – attended or blind
• Call waiting
• Caller ID name and number and outbound caller ID blocking
• Caller ID mapping for incoming calls
• Configurable dial/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
• Extension mobility/hot-desking
• Group paging
• Hoteling
• Intercom
• Individual volume setting per audio path (headset, handset, or speaker)
• Multicast paging
• Music on hold
• Outbound caller ID blocking
• Visual voice message waiting indicator (VMWI)
• Shared/bridge line appearance
• Supplementary services feature activation codes

Directory

• Local phonebook
• XML/Lightweight Directory Access Protocol (LDAP) remote directory
• Broadsoft directory
• Intelligent search
• Call history

Management

• Configuration: Browser, phone, auto-provision
• Auto-provision via TFTP, HTTP, or HTTPs for mass deployment
• Problem Reporting Tool (PRT)

Platforms supported

• Asterisk
  • Interoperability tested – Release (1.8 )
• Broadsoft
  • Interoperability tested and certified – Releases 19sp1, 20sp1, 21sp1
• Centile
  • Interoperability tested and certified – Release Istra SP 9.2
• Metaswitch
  • Interoperability tested and certified – Release 9.3

Session border controllers

• EdgeMarc
• Metaswitch Perimeter
• Oracle/Acme
• Sonus 5100

Signaling protocol support

• Session Initiation Protocol (SIP)

Full DN lines supported

• 4 lines (SIP registrations)

Codecs

• G.711 a, µ law
• G.722 (on headset, handset, and speakerphone)
• G.722.2 (on headset, handset, and speakerphone)
• G.729 a, b, ab
• ILBC
• iSAC
• OPUS

Language support

• Bulgarian (Bulgaria)
• Croatian (Croatia)
• Czech (Czech Republic)
• Danish (Denmark)
• Dutch (Netherlands)
• English (United Kingdom)
• French (France)
• German (Germany)
• Hungarian (Hungary)
• Italian (Italy)
• Norwegian (Norway)
• Polish (Poland)
• Portuguese (Portugal)
• Russian (Russian Federation)
• Spanish (Spain)
• Slovak (Slovakia)
• Swedish (Sweden)
• Slovenian (Slovenia)
• Turkish (Turkey)

Multiple ring tones

• The phones support user-adjustable ring tones.

Directories

• The phones identify incoming messages and categorise them on the screen. This makes it fast and easy to return calls using direct dial-back capability. The corporate directory integrates with the LDAP standard directory.

Quality-of-Service (QoS) options

• The phone supports Cisco Discovery Protocol and 802.1Q/p standards, and can be configured with an 801.1Q VLAN header containing the VLAN ID overrides configured by the admin VLAN ID.

Security

• Certificates
• Image authentication
• Device authentication
• File authentication
• Signaling authentication
• Media encryption using SRTP with Advanced Encryption Standard (AES)-128
• Signaling encryption using TLS with AES-128 or AES-256
• Encrypted configuration files
• 802.1X authentication
• Cryptography

Configuration options

• The user can configure the IP address assignment statically or through the DHCP client.

Physical dimensions (H × W × D)

• 207 x 265 x 33 mm (8.2 x 10.4 x 1.3 in.) (excluding foot stand)

Weight

• 615 g (22 oz) (excluding foot stand, handset, and package), 682 g (24 oz) (including foot stand, excluding handset and package)

Display

• 9 cm (3.5 in.), 396×162 pixels

Ethernet switch

• 10/100/1000BASE-T Ethernet connection through two RJ-45 ports, one for the LAN connection and the other for a PC connection.

Phone casing composition

• Polycarbonate acrylonitrile butadiene styrene (ABS) textured plastic.

Power requirements

• The 6851 IP phone is an interoperable IEEE 802.3af PoE (Class 2) device. 5V DC is required; supplied locally at the desktop using one of the optional AC-to-DC country-specific power supply.

Operational temperature

• 0°C to 40°C (32°F to 104°F)

Nonoperational temperature shock

• -10°C to 60°C (14°F to 140°F)

Humidity

• Operating 10% to 90%, noncondensing
• Non-operating 10% to 95%, noncondensing

Cosmetic

• Cisco cosmetic class A

Certification and compliance

• Regulatory compliance:
  • CE Markings per directives 2004/108/EC and 2014/30/EU
• Safety:
  • UL 60950 Second Edition
  • CAN/CSA-C22.2 No. 60950 Second Edition
  • EN 60950 Second Edition (including A11 & A12)
  • IEC 60950 Second Edition (including A11 & 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
• Telecom
  • 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)