Activation code or service domain CP-8841

[Felo-WF]

After resetting the phone, it asks for an activation code or service domain. 

From what I found out, I need a cfg.xml file but unfortunately I don't have anything like that. The phone is connected directly to the cisco switch. Where can I find such a sample cfg file or some standard one?
And I just wanted to update the software

Thank you for your help

[b.winter]

If you wanna register them to CUCM, then search the forum for old post.
This topic has been asked so many times here.

[Felo-WF]

I've already read that, but I don't have CUCM.

[b.winter]

But you added a tag "CUCM" ^^
Which PBX do you have?

[Felo-WF]

I don't have any PBX.

I would like to upload configuration files via tFTP
Sorry for the incorrect tag

[b.winter]

What you mean, you don't have any PBX?
Without a PBX, the phone is useless ...

[Nithin Eluvathingal]

If you don’t have any PBX, let’s explore what you intend to do with this phone. Here are some considerations based on the context:

1. Call Control Platform:
• Your phone needs to be registered with a call control platform. This could be either:
• On-premises: Such as Cisco Unified Communications Manager (CUCM).
• Cloud-based: Like Cisco Webex Calling.
• Third-party: If you’re using a non-Cisco solution.
2. MPP Model:
• If you plan to use it with a third-party call control platform, you’ll need an MPP (Multiplatform Phone) model.
• Alternatively, if you have an enterprise phone model, you can convert its firmware to MPP.
3. Share Details:
• To assist you further, please provide more details about your specific use case or requirements for this device.

[Felo-WF]

I wanted to configure the phone for VoIP (SIP) calls

[b.winter]

And how do you want to make VoIP calls without a PBX?! --> I'll answer it for you: it doesn't
Maybe you should first learn, how VoIP works ...

[Les Pruden]

Pretty harsh.  Your replies do not add value.  

[Felo-WF]

Of course you're right But my status is "Beginner"
My internet service provider has a virtual PBX.
Currently, I am stuck with updating the software due to lack of activation, hence my questions.
Thanks a lot for your help