CP-7811-K9 – Single-Line IP Phone – 10/100 Ethernet – PoE Class 1
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CP-7811-K9 Description
CP-7811-K9 is a Cisco IP Phone 7811 desk phone in the Cisco IP Phone 7800 Series for single-line IP voice endpoints on Cisco collaboration deployments. It provides a 3.28 in. 384 x 106 pixel grayscale display, 10/100BASE-T LAN and downstream-device RJ-45 connectivity, IEEE 802.3af Class 1 PoE power, Basic User Connect License alignment for Cisco Unified Communications Manager, and support for CUCM 12.5 and later, making it a simple desk endpoint for users who need IP telephony without video or multi-line expansion.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
CP-7811-K9 |
|
Product type |
Cisco IP Phone 7811 desk phone |
|
Supported line keys |
0 |
|
Display |
3.28 in. 384 x 106 pixel grayscale display |
|
Ethernet switch |
10/100BASE-T with LAN and downstream-device RJ-45 ports |
|
PoE class |
IEEE 802.3af Class 1 |
|
Power input rating |
0.42A, 48V DC |
|
CUCM license |
Basic User Connect License |
|
CUCM support |
Cisco Unified Communications Manager 12.5 and above |
|
Default handset |
Narrowband handset, with wideband available through optional handset |
|
Dimensions and weight |
207 x 195 x 33 mm, 806 g |
Application Scenarios
Use CP-7811-K9 for lobby, cafeteria, conference-center, or occasional-use positions where a Cisco IP Phone 7811 endpoint is enough and the order does not require multiple programmable line keys.
Select this SKU when the phone must attach to Cisco Unified Communications Manager with the Basic User Connect License tier documented for Cisco IP Phone 7811 and 7821 models.
Choose CP-7811-K9 when the access switch provides IEEE 802.3af Class 1 PoE and the desk location only needs 10/100BASE-T connectivity for the phone and downstream Ethernet device.
Product Comparison
|
Parameter |
CP-7811-K9 | ||
|---|---|---|---|
|
Cisco ordering ID |
CP-7811-K9= |
CP-7821-K9= |
CP-7841-K9= |
|
Cisco model description |
Cisco IP Phone 7811 |
Cisco IP Phone 7821 |
Cisco IP Phone 7841 |
|
Supported line keys |
0 |
2 |
4 |
|
Color availability |
Charcoal only |
Charcoal and white |
Charcoal and white |
|
Display |
3.28 in. 384 x 106 pixels |
3.5 in. 396 x 162 pixels |
3.5 in. 396 x 162 pixels |
|
Ethernet switch |
10/100BASE-T |
10/100BASE-T |
10/100/1000BASE-T |
|
CUCM license |
Basic User Connect License |
Basic User Connect License |
Enhanced User Connect License |
|
PoE class |
IEEE 802.3af Class 1 |
IEEE 802.3af Class 1 |
IEEE 802.3af Class 1 |
|
Approximate weight |
806 g |
867 g |
868 g |
- In a CP-7811-K9 vs CP-7821-K9 comparison, the main difference is line-key capacity: CP-7811-K9 has 0 supported line keys, while CP-7821-K9 has 2.
- The CP-7811-K9 vs CP-7841-K9 difference adds both line-key and Ethernet changes, because CP-7841-K9 has 4 supported line keys and 10/100/1000BASE-T Ethernet.
- For buyers deciding which model to choose, the CP-7811-K9 comparison should start with the required line-key count, then confirm the CUCM license tier and Ethernet speed requirement.
Selection Guide
1. Choose the single-line 7811 role
Select CP-7811-K9 when the position needs a Cisco IP Phone 7811 endpoint with no programmable line-key requirement and a simple 10/100 Ethernet connection.
2. Move to CP-7821-K9 for two line keys
Choose CP-7821-K9 instead when the user needs two supported line keys or a white color option within the Cisco IP Phone 7800 Series.
3. Move to CP-7841-K9 for Gigabit Ethernet
Use CP-7841-K9 when the desk phone order requires 10/100/1000BASE-T Ethernet or four supported line keys, and confirm the Enhanced User Connect License requirement.
4. Check voice platform and power details
Verify Cisco Unified Communications Manager 12.5 or later, the Basic UCL entitlement, the PoE or Cisco Power Adapter 3 plan, and any handset or wall-mount accessory during order approval.
Ordering Checklist
|
Check Item |
What to Confirm |
Why It Matters |
|---|---|---|
|
Exact phone model |
CP-7811-K9 for Cisco IP Phone 7811 |
Prevents substitution with 7821, 7841, or 7861 models that have different line-key counts |
|
Cisco ordering ID |
CP-7811-K9= in Cisco ordering documentation |
Aligns the site SKU with Cisco’s orderable product number format |
|
Call-control platform |
Cisco Unified Communications Manager 12.5 or later, Cisco Hosted Collaboration Solution 8.6.2 or later, or Cisco SRST 8.x or later |
Keeps the phone order matched to Cisco-documented call-control support |
|
License tier |
Basic User Connect License |
CP-7811-K9 uses the same Basic UCL tier as the 7821 model |
|
Power method |
IEEE 802.3af Class 1 PoE or Cisco Power Adapter 3 |
Avoids ordering a phone without the required desk-side power plan |
|
Ethernet requirement |
10/100BASE-T LAN and downstream-device ports |
Avoids choosing the 7811 where Gigabit Ethernet pass-through is required |
|
User audio and mounting needs |
Optional wideband handset and optional wall-mount kit if required |
Separates accessory requirements from the base phone SKU |
Product Front
The Cisco IP Phone 7800 Series has distinct hardware types:
- Cisco IP Phone 7811 No buttons on either side of the screen
- Cisco IP Phone 7821 Two buttons on the left side of the screen
- Cisco IP Phone 7841 Two buttons on either side of the screen
- Cisco IP Phone 7861 16 buttons at the right edge of the phone
|
1 |
Incoming call or voicemail indicator |
|
2 |
Line and feature buttons |
|
3 |
Softkeys |
|
4 |
Navigation (navigation ring and Select button |
|
5 |
Hold, Transfer, and Conference |
|
6 |
Speakerphone, Headset, and Mute |
|
7 |
Voicemail, Applications, and Directory |
|
8 |
Volume |
Use line and feature buttons to view calls on a line, or access features such as Speed Dial.Buttons illuminate to indicate status:
|
Green, steady |
Active call |
|
Green, flashing |
Held call |
|
Amber, steady |
Private line in use |
|
Amber, flashing |
Incoming call |
|
Red, steady |
Remote line in use |
|
Red, flashing |
Remote line on hold |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | CP-7811-K9 | Cisco ordering ID | CP-7811-K9= |
| Product type | Cisco IP Phone 7811 desk phone | Supported line keys | 0 |
| Display | 3.28 in. 384 x 106 pixel grayscale display | Ethernet switch | 10/100BASE-T with two RJ-45 ports |
| PoE class | IEEE 802.3af Class 1 | Power consumption | Does not exceed 3.84 W |
| Power input rating | 0.42A, 48V DC | CUCM license | Basic User Connect License |
| CUCM support | Cisco Unified Communications Manager 12.5 and above | Hosted Collaboration support | Cisco Hosted Collaboration Solution 8.6.2 and later |
| SRST support | Cisco Unified SRST 8.x and later | Signaling protocol | Session Initiation Protocol |
| Codec support | G.711, G.722, G.722.2, G.729ab, iLBC, OPUS | Default handset | Narrowband handset with RJ-9 connection |
| Wideband handset | Available with optional wideband handset | Foot-stand position | 45 degrees |
| Wall mounting | Optional wall-mount kit | Dimensions | 207 x 195 x 33 mm excluding foot stand |
| Weight | 806 g | Operating temperature | 32 to 104 degrees F (0 to 40 degrees C) |
| Operating humidity | 10% to 90%, non-condensing | Phone casing composition | Polycarbonate ABS textured plastic |
Get More Information
Need pricing, stock, or shipping details for the CP-7811-K9 ? Layer23-Switch can help you check current availability, lead time, and delivery options for this. Send us the part number, quantity, and destination country via live chat or email sales@layer23-switch.com for a fast quotation.
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Customer Reviews
Questions & Answers
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What role does CP-7811-K9 fill in a phone deployment?
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Does CP-7811-K9 support multiple extensions?
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Can CP-7811-K9 work with Cisco Unified Communications Manager?
-
Why does CP-7811-K9 fail to get an address on some switch ports?
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Does CP-7811-K9 have a PC passthrough port?
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What power choices apply to CP-7811-K9?
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Where is CP-7811-K9 a poor fit?
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What migration detail matters for CP-7811-K9?
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