Cisco IP Phone 7811 Single-Line Business Desk Phone
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PRODUCT DESCRIPTION
Cisco UC Phone 7811 (CP-7811-K9=) — Local Warranty
Single-line phone for common areas and light users
The Cisco IP Phone 7811 (CP-7811-K9=), listed by Cisco as the UC Phone 7811, is the entry model of the 7800 Series. It supports one line and suits lobbies, break rooms, classrooms, warehouses and users who mainly make and take simple calls on Cisco Unified Communications Manager (12.5 and later) or Cisco Hosted Collaboration Solution.
Clear greyscale display
A 3.28-inch 384 x 106 pixel greyscale display (non-backlit) shows caller ID and call status.
Fixed feature keys
Fixed keys give one-touch access to hold/resume, transfer, conference, messaging, directory and services, keeping operation simple for occasional users.
Wideband audio with speakerphone
Wideband audio and a full-duplex speakerphone support hands-free calls. The 7811 has no headset port, so it is intended for handset and speakerphone use.
Low-power PoE and secure calls
The phone draws no more than 3.84 W on IEEE 802.3af PoE Class 1, supports Cisco EnergyWise and is Energy Star certified. TLS signalling, SRTP media encryption and 802.1X authentication are supported.
Cisco IP Phone 7811 Datasheet — Technical Specifications
Display & Keys
| Display | 3.28-in. 384 x 106 pixel greyscale, non-backlit |
| Lines | 1 |
| Keys | Fixed keys: services, messaging, directory, hold/resume, transfer, conference |
Audio
| Speakerphone | Full-duplex |
| Headset port | None (no headset key on the 7811) |
| Codecs | G.711 (A-law/µ-law), G.722, G.722.2, G.729ab, iLBC, OPUS |
Connectivity
| Ethernet | Two RJ-45 10/100BASE-T ports (LAN + downstream device) |
Power
| PoE | IEEE 802.3af Class 1, max 3.84 W |
| Energy | Cisco EnergyWise; Energy Star certified |
Security
| Signalling | TLS with AES-128 or AES-256 |
| Media | SRTP with AES-128 |
| Network access | 802.1X authentication |
Physical
| Dimensions | 207 x 195 x 33 mm (excluding foot stand) |
| Weight | 806 g |
| Operating temperature | 0° to 40°C |
| Wall-mount kit | CP-7811-WMK=, sold separately |
Compatibility & Software Support
Call control (this part number)
CP-7811-K9= ships with enterprise firmware for Cisco Unified Communications Manager 12.5 and later and Cisco Hosted Collaboration Solution 8.6.2 and later. A multiplatform-firmware version, CP-7811-3PCC-K9=, is sold separately for third-party and hosted platforms.
End-of-Sale notice
Cisco has published the "End-of-Sale and End-of-Life Announcement for the Cisco IP Phone 7811" (announced 29 April 2026), covering CP-7811-K9=. Milestones: End-of-Sale 28 October 2026; Last Ship Date 26 January 2027; End of SW Maintenance Releases 28 October 2027; End of Vulnerability/Security Support 27 October 2029; Last Date of Support 31 October 2031. Cisco names the Cisco Desk Phone 9811 as the replacement product.
Warranty
Local Singapore unit with local warranty. Cisco's datasheet lists a standard 1-year replacement warranty. For warranty claims, keep your SourceIT invoice as proof of purchase.
Package Contents & Cisco IP Phone Ordering Information
What the Part Number Covers
CP-7811-K9= is the phone with enterprise firmware. The wall-mount kit (CP-7811-WMK=) and local power adapter are separate accessories; the Cisco datasheet does not publish a full in-the-box list.
Cisco IP Phone Family
| Model | Key difference |
| Cisco IP Phone 7811 (CP-7811-K9=) (this listing) | 1 line, 3.28-in. greyscale non-backlit display, 10/100 switch, no headset port |
| Cisco IP Phone 8811 (CP-8811-K9=) | 5 line keys, 5-in. backlit greyscale display, Gigabit switch, headset + AUX ports |
| Cisco IP Phone 8851 (CP-8851-K9=) | 5 line keys, 5-in. colour display, Bluetooth, USB, Intelligent Proximity, KEM support |
| Cisco IP Phone 7821 / 7841 / 7861 | 7800 Series with 2, 4 or 16 lines and a 3.5-in. 396 x 162 display |
| Cisco Desk Phone 9811 | Cisco-named replacement for the 7811 |
Datasheet & Downloads
Frequently Asked Questions — Cisco IP Phone 7811
Does the 7811 have a headset port?
No. Cisco states the headset key is not available on the IP Phone 7811; use the handset or the full-duplex speakerphone.
Is the display backlit?
No. The 7811 has a 3.28-inch 384 x 106 greyscale display without backlight.
How much power does it draw?
It is IEEE 802.3af PoE Class 1, with power consumption not exceeding 3.84 W.
Is the 7811 end-of-sale?
Cisco's end-of-sale date for CP-7811-K9= is 28 October 2026, with last ship 26 January 2027 and support until 31 October 2031. Cisco names the Desk Phone 9811 as the replacement.
Which call platforms does it support?
This enterprise-firmware part supports Cisco Unified Communications Manager 12.5 and later and Cisco Hosted Collaboration Solution.
