3CX is a software-based business phone system used by companies for VoIP calls, internal extensions and reception desks, and its default ringtone has become familiar in workplaces. As remote work and office prank videos grew online, recordings of the ring were shared as a standalone effect alongside classic phone ringtones and other office sounds. Creators reuse it because it is instantly recognisable as a real incoming call rather than a cartoon ring, making it useful for realistic scenes, fake call pranks and workplace comedy without needing a physical desk phone.