Cisco 7841 phones are listed as certified ZTP but...I'm probably missing something

[Boyan]

Hi everyone,

So 7841 - fully supported but does exactly nothing. I wonder if I got the wrong "revision" or what not? I got Mfg. Part#: CP-7841-K9=

Could someone dealing with 7841s chime-in some wisdom for me? What the phone does is this: it gets an IP address (I can ping it fine) and then it sits with "Registration in Progress" message on its LCD:

[yunus389]

500

[Boyan]

@yunus389 Thanks, could you clarify? 500?

[Eliot · Accepted solution]

hi boyan,

Zoom phone certified hardware states:

“Cisco

Notes:

• Only Cisco multi-platform (MPP) phones are supported by Zoom Phone. This is indicated by 3PCC, 3PC, or 3PW after the model number.
• Please carefully review Cisco's documentation for compatible models and firmware conversion from Enterprise to MPP to ensure that the devices are compatible with the required firmware and services.

Model	Mutual TLS with AES-256 encryption	Call media (SRTP)	Firmware version supported	ZTP
6821 / 6851 / 6861 / 6871 IP Phone (multi-platform versions)	✔	AES-256	11.3.7 (8/21/2022)	✔
7811 IP Phone (multi-platform versions)	✔	AES-256	11.3.7 (8/21/2022)	✔
7821 / 7841 IP Phone (multi-platform versions)	✔	AES-256	11.3.7 (8/21/2022)	✔

Zoom Phone Certified Hardware – Zoom Support

Based on the part number, you probably have the version of 7841 used with cisco unified call manager.

You should have Cisco IP Phone 7841 shipped with Multiplatform Phone firmware

part number is CP-7841-3PCC-K9=

Cisco IP Phone 7800 Series with Multiplatform Phone Firmware Data Sheet - Cisco

Thanks,  eliot

[Boyan]

For the benefit of everyone - ordering CP-7841-3PCC-K9= was the solution; my bad; I got the wrong part ordered the first go!