For a recent demonstration…
I sat down to a web-meeting and conference call (VOIP telephony) and shared my desktop, while connected to my corporate VPN, running a virtual computing system (the demonstration system) accessed remotely (through a desktop emulator), which was itself running a virtual phone system / communications technology (the product being demonstrated), dialed into via cell phone by a peer on-site at the customer, which came back into my USB headset, which was itself full-duplexing the concall, the inbound call, and a conferenced demo role all at once through the same headphones and mic, recording the calls themselves to boot. All from my laptop, wirelessly connected to a router connected to a cable-modem inside my home office.
I took a smooth sip of coffee and showed them how easy the products were to use.
I’m sure you would have done the same.