Please search the forum before asking. This question has been asked and answered many times already

You'd already have had many solutions to try by now if you had made a little effort to search

Guillaume

I do this literally every week, and have done for about seven years.

First - you said "phone calls" so I presume that means you want your guests to be able to dial a normal phone number and reach you, with no other technical complexity. Ubiquitous, easy access.

My situation is a little different, since I allow anyone to join the show by telephone. Not just a single, planned guest.

I use a SIP soft phone installed on my vMix host. It connects to a conference service (http://www.zipdx.info.) The audio to/from the SIP soft phone is dealt with using the same mix-minus technique that people have long used to receive Skype into vMix.

My "guests" dial into the conference service and enter a conference code. They are then connected to my show.

To keep noise to a minimum, I set the conference service to keep everyone muted at first. So they are listen-only. They can unmute themselves by pressing *6 on the telephone keypad if they want to speak.

The conference service has access numbers in about 60 countries, which makes it easier to have guests connect from far-off locations. It can also call out to them, which is sometimes cheaper and more convenient.

The conference dashboard has a great set of controls for managing the participants connected by telephone. I think of it as the stage manager & green room.

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If you only need a way to connect to a single guest by telephone, you may not need the conference service. Any SIP-based phone service (there are dozens, like Vonage, OnSIP, etc.) That would give you a phone number that you can bring into your vMix system.

As a practical matter, given typical billing models, it can be both cheaper and more scalable to use ZipDX.

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Aside #1 - back in 2008 I interviewed the founder and CEO of ZipDX, which is how we met. He eventually sponsored our show, providing the ZipDX platform for our use which continues to this day.

Aside #2 - In 2013 ZipDX ended up hiring me.

Aside #3 - ZipDX supports wideband telephony (aka HDVoice,) which delivers far better audio quality. However, this post is already long enough.

If you use a mixing board then a BlueDriver M3 from JK Audio might do the trick. It plugs into a mic input on your mixing board and pares with your phone via bluetooth. It;s a bit costly....in the $300 range .....I think. You can also use SKYPE and just import the audio. Need virtual cables to do this, but it works fine.