CP-7841-K9 – Four-Line IP Phone – Gigabit Ethernet – Enhanced UCL
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CP-7841-K9 Description
CP-7841-K9 is a Cisco IP Phone 7841 desk phone in the Cisco IP Phone 7800 Series for users who need a four-line voice endpoint on Cisco Unified Communications Manager. It combines a 3.5 in. grayscale display, four supported lines, Gigabit Ethernet pass-through with LAN and downstream-device RJ-45 ports, IEEE 802.3af Class 1 PoE, Enhanced User Connect License alignment, and CUCM 12.5-and-later support for reception, assistant, and team desk deployments where the phone must preserve 10/100/1000BASE-T connectivity at the workstation.
Quick Specs
|
Parameter |
Specification |
|---|---|
|
Product ID |
CP-7841-K9 |
|
Product type |
Cisco IP Phone 7841 desk phone |
|
Supported lines |
4 |
|
Display |
3.5 in. 396 x 162 pixel grayscale display |
|
Ethernet switch |
10/100/1000BASE-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 |
Enhanced User Connect License |
|
CUCM support |
Cisco Unified Communications Manager 12.5 and above |
|
Handset and headset |
Wideband-capable RJ-9 handset and RJ-9 analog headset port |
|
Dimensions and weight |
207 x 206 x 28 mm, 868 g |
Application Scenarios
Use CP-7841-K9 for reception, assistant, or team desk positions that need four supported lines on a Cisco 7800 Series phone, but not the larger sixteen-line layout of CP-7861-K9.
Choose this model when the phone is cabled between the access switch and a downstream PC that must remain on a Gigabit Ethernet path.
Place CP-7841-K9 on a Cisco Unified Communications Manager bill of materials when the entitlement plan already includes Enhanced User Connect License coverage for the phone.
Product Comparison
|
Parameter |
CP-7841-K9 | ||
|---|---|---|---|
|
Cisco ordering ID |
CP-7841-K9= |
CP-7821-K9= |
CP-7861-K9= |
|
Cisco model description |
Cisco IP Phone 7841 |
Cisco IP Phone 7821 |
Cisco IP Phone 7861 |
|
Supported lines |
4 |
2 |
16 |
|
Color availability |
Charcoal and white |
Charcoal and white |
Charcoal and white |
|
Display |
3.5 in. 396 x 162 pixels |
3.5 in. 396 x 162 pixels |
3.5 in. 396 x 162 pixels |
|
Ethernet switch |
10/100/1000BASE-T |
10/100BASE-T |
10/100BASE-T |
|
CUCM license |
Enhanced 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 |
868 g |
867 g |
1053 g |
- In a CP-7841-K9 vs CP-7821-K9 comparison, the confirmed differences are four supported lines instead of two, 10/100/1000BASE-T Ethernet instead of 10/100BASE-T, and Enhanced UCL instead of Basic UCL.
- The CP-7841-K9 vs CP-7861-K9 difference is line capacity and Ethernet speed: CP-7861-K9 has sixteen supported lines, while CP-7841-K9 keeps Gigabit desktop pass-through.
- For buyers deciding which model to choose, the CP-7841-K9 comparison should start with the required line count, then check whether the desk needs Gigabit Ethernet and Enhanced UCL entitlement.
Selection Guide
1. Start with the visible-line requirement
Choose CP-7841-K9 for users who need four supported lines. Keep CP-7821-K9 for two-line desks and use CP-7861-K9 only when sixteen supported lines are required.
2. Treat Gigabit pass-through as a deciding field
Select the 7841 when the downstream device behind the phone needs 10/100/1000BASE-T connectivity through the phone switch.
3. Align the CUCM license before approval
Use Enhanced User Connect License for the Cisco Unified Communications Manager plan. Basic UCL belongs to the 7811 and 7821 tier, not this 7841 SKU.
4. Keep the base phone separate from accessories
Confirm whether the site needs charcoal CP-7841-K9= or white CP-7841-W-K9=, then add wall-mount parts, power adapters, and regional cords only when the deployment requires them.
Ordering Checklist
|
Check Item |
Confirmation Needed |
Ordering Risk |
|---|---|---|
|
Cisco PID |
CP-7841-K9= for Cisco IP Phone 7841 |
Keeps the order from drifting to the two-line 7821 or sixteen-line 7861 |
|
User profile |
Four supported lines at the endpoint |
Matches the phone to the actual button and line appearance need |
|
Desk Ethernet |
10/100/1000BASE-T LAN and downstream-device connectivity |
Avoids installing a 10/100 phone where the PC path requires Gigabit Ethernet |
|
Voice platform |
Cisco Unified Communications Manager 12.5+, Cisco Hosted Collaboration Solution 8.6.2+, or Cisco SRST 8.x+ |
Keeps the endpoint tied to Cisco-documented call-control support |
|
License tier |
Enhanced User Connect License for CUCM registration |
Prevents a Basic UCL entitlement from being attached to the 7841 order |
|
Power plan |
IEEE 802.3af Class 1 PoE or Cisco Power Adapter 3 |
Confirms whether the desk power path comes from the access switch or an external adapter |
|
Color and mounting extras |
CP-7841-K9= for charcoal, CP-7841-W-K9= for white, and optional 7800 wall-mount kit if needed |
Keeps visual standardization and mounting hardware visible as separate decisions |
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 |
Specifications
| Parameter | Specification | Parameter | Specification |
|---|---|---|---|
| Product ID | CP-7841-K9 | Cisco ordering ID | CP-7841-K9= |
| Product type | Cisco IP Phone 7841 desk phone | Supported lines | 4 |
| Display | 3.5 in. 396 x 162 pixel grayscale display | Ethernet switch | 10/100/1000BASE-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 | Enhanced 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 | Handset | Wideband-capable RJ-9 handset |
| Headset port | Wideband-capable RJ-9 analog headset port | Speakerphone | Full-duplex speakerphone |
| Foot-stand positions | 30 degrees and 45 degrees | Wall mounting | Optional wall-mount kit |
| Dimensions | 207 x 206 x 28 mm excluding foot stand | Weight | 868 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 | Color options | Charcoal base model, separate white SKU available |
Get More Information
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Customer Reviews
Questions & Answers
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What role does CP-7841-K9 serve?
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How is CP-7841-K9 different from CP-7821-K9?
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Does CP-7841-K9 have a backlit display?
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What user profile fits CP-7841-K9?
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Can CP-7841-K9 work with Cisco call control?
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Why does CP-7841-K9 fail registration?
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Does CP-7841-K9 fit heavy receptionist use?
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What migration check matters for CP-7841-K9?
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