How to set up a cabinet in a Yealink T21P E2 IP phone?

Question

Telephony

Dear experts, good day!
Is it possible to set up an office in the Yealink T21P E2 device under the following conditions:
Initially, it is possible to combine more than 4 subscribers in the device using the transfer function and the code * 061.
I would like to set it up as follows:
when an incoming or outgoing call is pressed, by pressing some button (preferably one or two), subscribers whose numbers are registered (I don’t know where) are automatically connected to the conversation.
In other words, by pressing the button (for example) Transfer, an outgoing signal went to five to seven subscribers, who, having answered the call, would automatically get into the conference.
If anyone has done something like this, please share your experience.

Thank you.

Answer 1

This is what the PBX should do. Create a meet room on the PBX, give it a number and a list of participants. When you call the meet room number, the PBX does will collect participants.