- 3.5-inch high-resolution 396 x 1262 pixel display
- Supports 4-line IP telephone system with PoE technology
- Provides electronic hookswitch headset control
- Supports SIP protocols
- Dual fast Ethernet port and optional wideband handset
- Offers compatibility with the Cisco Unified IP Phone Power Injector and Cisco Aironet Power Injector
- Works with the optional Key Expansion Module (KEM)
- Supports a power-save option that reduces power consumption during off-hours
Cisco 6851 IP Phone Description
Meet the Cisco 6851 IP Phone, one of the 6800 series handsets. This IP phone is designed to cater to the needs of professional environments, balancing advanced functionality with user-friendly operation. It features a 3.5-inch high resolution 396 x 1262 pixel screen which offers a range of features for enhanced productivity and flexibility in communication.
The Cisco 6851 supports a 4-line IP telephone system with PoE technology, enabling quick access to frequently used functions and features. The IP phone provides electronic hookswitch headset control that enables call control functionality directly on the headset, eliminating the need for a mechanical handset lifter. Supporting SIP protocols, the 6851 IP phone establishes, maintains, and terminates real-time media communication sessions between two or more parties. It features a dual fast Ethernet port and an optional wideband handset, enabling you to easily connect to compatible computers and headsets. The IP phone offers compatibility with the Cisco Unified IP Phone Power Injector and Cisco Aironet Power Injector. It works with the optional Key Expansion Module, showing the phone status with different colours illuminating the phone functionality. The 6851 IP phone supports a power-save option that reduces power consumption during off hours. It allows for easy installation which eliminates the need for drivers in the installation procedures.
Display for Easy User Interface
The 6851 IP phone features a 3.5-inch (89 mm) backlit colour display with a resolution of 320 x 240 pixels that provides clear visibility and easy navigation through menus and contacts. Thanks to its easy-to-navigate interface, the IP phone is integrated with dedicated buttons for common functions and a well-organised menu system. The phone provides visual aids, providing adjustable contrast and text sizes for improved accessibility. It supports up to 4 lines or call appearances, suitable for handling multiple calls and extensions.
Audio Quality
Incorporating technology for superior audio clarity and a professional calling experience, the 6851 IP phone is the ideal phone for your professional use. It delivers HD Voice that supports wideband audio for clearer, more natural-sounding calls. With a full-duplex speakerphone, it allows for hands-free communication without clipping or distortion.
Programmable Keys
With customisable 4 programmable line keys and 4 soft keys, the 6851 IP phone allows for quick access to frequently used functions and features. This supports call management functionality that ensures advanced call handling features like call forwarding, call transfer, call hold, and conference calling. The voicemail integration seamlessly integrates with voicemail systems for efficient message management.
Ethernet Ports and Power Options
The 6851 IP phone includes a dedicated headset port for easy connection of compatible headsets for hands-free use. It is engineered with 10/100/1000 Ethernet ports, supporting network pass-through and enabling easy connection of a computer or other devices. This IP phone can be powered via PoE, eliminating the need for a separate power adapter and simplifying installation. It can also be powered through an optional external power adapter.
What's in the Box?
- Cisco 6851 IP Phone
Cisco 6851 IP Phone Technical Specs
Signaling protocol support
- Session Initiation Protocol (SIP)
Full lines supported
- 4 lines (SIP registrations)
Language support
- Bulgarian
- Catalan
- Chinese (Simplified)
- Chinese (Traditional, Hong Kong)
- Croatian
- Czech
- Danish
- Dutch
- English (American)
- English (United Kingdom)
- Finnish
- French (France)
- Greek
- Spanish (Colombia)
- German
- Hungarian
- Italian
- Japanese
- Korean
- Norwegian
- Polish
- Portuguese (Portugal)
- Russian
- Spanish (Spain)
- Slovak
- Swedish
- Slovenian
- Turkish
Multiple ring tones
- The phones support user-adjustable ringtones
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
- 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
Configuration options
- The user can configure the IP address assignment statically or through the DHCP client
Physical dimensions (HxWxD)
- 6851: 8.2 x 10.4 x 1.3 in. (207 x 265 x 33 mm) (excluding foot stand)
Weight
- 6851: 22 oz. (615 g) (excluding foot stand, handset, and package), 24 oz. (682 g) (including foot stand, excluding handset and package)
Display
- 3.5 in. (9 cm), 396 x 162 pixels
Ethernet switch
- 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
Phone and KEM casing composition
- Polycarbonate Acrylonitrile Butadiene Styrene (ABS) textured plastic
Power requirements
- 6821: 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. See Table 6 for a list of available power supplies
Operational temperature
- 32° to 104°F (0° to 40°C)
Nonoperational temperature shock
- 14° to 140°F (-10° to 60°C)
Humidity
- Operating 10% to 90%, non-condensing
- Non-operating 10% to 95%, non-condensing
Certification and compliance for 6821
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 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
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 802.3af (for CP-6851 only)
More Information
| SKU | CP-6851-3PCC-K9= |
|---|---|
| Brand | Cisco |
| Audio Conference Type | Desk Phone |
| Number of Lines | 4 Lines |
| Multiple Part Calling | No |
| Interface | Ethernet |
| With Display | No |
| Connectivity | Wired |
| No. of User(s) | 1 |
| Room Size | Small |
| Connect To | IP Lines |
| Display Option | Display & Keypad |
| Available Ports | Ethernet |
| Keypad | Yes |
Reviews
Search FAQs
Questions & Answers
Cisco 6851 IP Phone Description
Meet the Cisco 6851 IP Phone, one of the 6800 series handsets. This IP phone is designed to cater to the needs of professional environments, balancing advanced functionality with user-friendly operation. It features a 3.5-inch high resolution 396 x 1262 pixel screen which offers a range of features for enhanced productivity and flexibility in communication.
The Cisco 6851 supports a 4-line IP telephone system with PoE technology, enabling quick access to frequently used functions and features. The IP phone provides electronic hookswitch headset control that enables call control functionality directly on the headset, eliminating the need for a mechanical handset lifter. Supporting SIP protocols, the 6851 IP phone establishes, maintains, and terminates real-time media communication sessions between two or more parties. It features a dual fast Ethernet port and an optional wideband handset, enabling you to easily connect to compatible computers and headsets. The IP phone offers compatibility with the Cisco Unified IP Phone Power Injector and Cisco Aironet Power Injector. It works with the optional Key Expansion Module, showing the phone status with different colours illuminating the phone functionality. The 6851 IP phone supports a power-save option that reduces power consumption during off hours. It allows for easy installation which eliminates the need for drivers in the installation procedures.
Display for Easy User Interface
The 6851 IP phone features a 3.5-inch (89 mm) backlit colour display with a resolution of 320 x 240 pixels that provides clear visibility and easy navigation through menus and contacts. Thanks to its easy-to-navigate interface, the IP phone is integrated with dedicated buttons for common functions and a well-organised menu system. The phone provides visual aids, providing adjustable contrast and text sizes for improved accessibility. It supports up to 4 lines or call appearances, suitable for handling multiple calls and extensions.
Audio Quality
Incorporating technology for superior audio clarity and a professional calling experience, the 6851 IP phone is the ideal phone for your professional use. It delivers HD Voice that supports wideband audio for clearer, more natural-sounding calls. With a full-duplex speakerphone, it allows for hands-free communication without clipping or distortion.
Programmable Keys
With customisable 4 programmable line keys and 4 soft keys, the 6851 IP phone allows for quick access to frequently used functions and features. This supports call management functionality that ensures advanced call handling features like call forwarding, call transfer, call hold, and conference calling. The voicemail integration seamlessly integrates with voicemail systems for efficient message management.
Ethernet Ports and Power Options
The 6851 IP phone includes a dedicated headset port for easy connection of compatible headsets for hands-free use. It is engineered with 10/100/1000 Ethernet ports, supporting network pass-through and enabling easy connection of a computer or other devices. This IP phone can be powered via PoE, eliminating the need for a separate power adapter and simplifying installation. It can also be powered through an optional external power adapter.
What's in the Box?
- Cisco 6851 IP Phone
Cisco 6851 IP Phone Technical Specs
Signaling protocol support
- Session Initiation Protocol (SIP)
Full lines supported
- 4 lines (SIP registrations)
Language support
- Bulgarian
- Catalan
- Chinese (Simplified)
- Chinese (Traditional, Hong Kong)
- Croatian
- Czech
- Danish
- Dutch
- English (American)
- English (United Kingdom)
- Finnish
- French (France)
- Greek
- Spanish (Colombia)
- German
- Hungarian
- Italian
- Japanese
- Korean
- Norwegian
- Polish
- Portuguese (Portugal)
- Russian
- Spanish (Spain)
- Slovak
- Swedish
- Slovenian
- Turkish
Multiple ring tones
- The phones support user-adjustable ringtones
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
- 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
Configuration options
- The user can configure the IP address assignment statically or through the DHCP client
Physical dimensions (HxWxD)
- 6851: 8.2 x 10.4 x 1.3 in. (207 x 265 x 33 mm) (excluding foot stand)
Weight
- 6851: 22 oz. (615 g) (excluding foot stand, handset, and package), 24 oz. (682 g) (including foot stand, excluding handset and package)
Display
- 3.5 in. (9 cm), 396 x 162 pixels
Ethernet switch
- 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
Phone and KEM casing composition
- Polycarbonate Acrylonitrile Butadiene Styrene (ABS) textured plastic
Power requirements
- 6821: 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. See Table 6 for a list of available power supplies
Operational temperature
- 32° to 104°F (0° to 40°C)
Nonoperational temperature shock
- 14° to 140°F (-10° to 60°C)
Humidity
- Operating 10% to 90%, non-condensing
- Non-operating 10% to 95%, non-condensing
Certification and compliance for 6821
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 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
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 802.3af (for CP-6851 only)
| SKU | CP-6851-3PCC-K9= |
|---|---|
| Brand | Cisco |
| Audio Conference Type | Desk Phone |
| Number of Lines | 4 Lines |
| Multiple Part Calling | No |
| Interface | Ethernet |
| With Display | No |
| Connectivity | Wired |
| No. of User(s) | 1 |
| Room Size | Small |
| Connect To | IP Lines |
| Display Option | Display & Keypad |
| Available Ports | Ethernet |
| Keypad | Yes |
