wait for a short period of time Englisch:

Mr Smith is busy at the moment, would you like to hang on for a while?

hang on a minute

[I think we should hang on and see the end of the game.]

Could you hang on a minute while I finish with this customer?

I suppose I could hang on here till she comes back

call on family\friends

Therefore, I call on the Commission to develop a new strategy for world trade call on me...

- He called on our friends to help. - We may need to call on professional help.

Our representative will call on your company next Tuesday.

I had occasion to call on him last year.