Polycom VVX 500 series - If Im already on two calls, how do I join them into a conference call?; Call Park; How do I park a call?

Polycom VVX 500 / 510 / 600 / 610
Transfer a Call > Consultative
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1
Tap Transfer
2
Dial recipient
3
Tap More
4
When ready to complete transfer, tap More
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Tap Transfer
6
Tap Dial icon or wait