This is so confusing to me. I have both models (as far as I'm aware, it is possible that the second time I purchased these phones I was sent the wrong model) and they look and behave exactly the same. I have no intention to use Call Manager, or any 3rd party PBX service. I want two phones, in the same subnet, that can call each other directly using their IP addresses. Is this not possible?
I believe I have both models but I can't be certain because the outside markings are exactly the same. I believe the first phone I bought is the CP-7841-K9; which I think is the wrong model based on the information provided in this thread: https://community.cisco.com/t5/ip-telephony-and-phones/help-i-can-t-configure-a-sip-line-on-cisco-phone-cp-7841-without/m-p/3373138#M362139
So I went to Amazon and ordered the cp-7841-3pcc model and just received it today. But both phones look and behave exactly the same. When it boots up it's asking to "Enter activation code or service domain". I don't know how to get past this screen. From what I understand, I can't simply flash the firmware to get the multi-platform firmware. And for that reason, I bought another phone.
Phone information as shown on the LCD for the first phone that I bought is as follows:
Model Number: CP-7841
Active Load: sip78xx.12-0-1-11
Last Upgrade: 9/6/17 16:24
Active Server: None
Stand-by-Server: None
Phone information as shown on the LCD for the second phone that I bought is as follows:
Model Number: CP-7841
Active Load: sip78xx.12-0-1-11
Last Upgrade: 9/6/2017 16:24
Active Server: None
Stand-by-Server: None
I bought this phone at the following location: https://www.amazon.com/gp/product/B01I9UAZBG/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1
How do I know if they've sent me the wrong model if they both seem to have the exact same markings on the back? Do I need to return these phones?
