Webex - phone with or without 3PCC?

[jdiepen]

Hello,
 
we are offering Webex (license Webex Calling Basic Calling) to a new customer.
 
Do I need to offer phones with or without 3PCC?
 
Which one is correct with Webex:  CP-8861-K9= or CP-8861-3PCC-K9=?
 
What is the difference between those two?
 
So far, I did not find this in a sales guide; which one to use for Webex calling?
https://www.cisco.com/c/en/us/partners/tools/collaboration-ordering-guides.html 
shows guides for Webex gateway and ContactCenter, which are not applicable here.
 
https://www.cisco.com/c/en/us/products/collaboration-endpoints/ip-phones/multiplatform-firmware.html says:
"Cisco Multiplatform Phones are powered by Cisco Webex Calling or an approved third-party UCaaS provider."
This does not definitively answer my question: does a phone on Webex Calling require a multiplatform phone? Or does it also work with phones like CP-8861-K9= ?
 
I know CP-8861-K9=  from on-premise CUCM deployments. Webex and 3PCC is new to me. I would appreciate some explanation;-)
 
Thanks, Jos

[Chris Deren]

For any cloud service including Webex calling you need the Multiplatform Phones which are CP-8861-3PCC-K9=

https://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-8800-series/datasheet-c78-738030.html

[Leo Laohoo]

Check the back of the phone. Look for any indication as to what "HW" version it is (usually a sticker). If the phone is has a HW version of "V15" then it won't work with Webex Calling (aka Spark Calling) due to CSCvs58194.
If the HW version is version 7 (and below) it should work.