Asterisk extensions call

If there are extensions 101, 102, and 103 in Asterisk, how do I create a group to ring all of them or ring them sequentially?

If I want to ring all at once, I can just
Dial(pjsip/101&pjsip/102&pjsip/103),
But how can I make the call go in the order of 101->102->103 or not answered?

You mean endpoints, not extensions.

By using a queue or by having 3 consecutive calls to Dial ().

I want to create a group so that the phone rings sequentially. And I want to implement the pick-up function, but it doesn’t work well.

You need to mention call pickup in the subject.

I don’t have practical experience of that, so any suggestion would be based on the documentation.