Push-to-Talk connects users in different parts of your organization. For example, you can create a list of customer service representatives who can chat with Jim in the warehouse using Push-to-Talk on their phones. This way, the reps can quickly chat with Jim about things like inventory and delivery schedules. And if you don't want sales reps to be able to do the same thing, you can add them to Jim's Blocked users list.
From the customer view in https://admin.webex.com, go to Users and then select the user you want to modify.
Select Calling, go to Advanced Call Settings, and then turn on Push to Talk.
Choose the Connection Type:
Create your Allowed and Blocked Users lists and then click Save.
Let people in the Allowed Users list know that they can use their desk phone to communicate with users that have Push-to-Talk enabled. They can press *50 and then enter the extension of the person they want to use Push-to-Talk with.