The general context of communication is known as communication:

The general context of communication is known as the communication situation.

The situation is the broad surrounding setting within which a given act of communication takes place.

Position names a standpoint or location and does not denote the overall context.

Praxis refers to practice or applied action, not the encompassing frame of communication.

Convention names an agreed rule or custom, a narrower notion than the general context.

The communication situation supplies the wider circumstances that give an exchange its meaning.