Under "COVID-19 time," a couple with which I am working has what is probably a common problem. Both work full-time from home. Both use the Internet. One needs to be able to occasionally talk on the telephone (isn't that a quaint phrase?) with coworkers. The other's main job is receiving calls from customers with user-level problems or "how to" questions. Those calls can last between 10 to 60 minutes. Because they are customers, he is "on" with the customer a majority of that time, although he can put a customer on "hold" to research something or to handoff the call.
They found that they needed a protocol for what I used to call, in a previous career, "servicing an interrupt." It was a major tension-point, but easily solved. We brain-stormed.
- The sky is falling! House fire! Tornado! Duck and cover (Cold War reference)!
Both agreed there are some situations in which they agreed to dispense with protocol.
- Longer question, answer required.
Sticky-note on desk or computer screen. Don't wait around for an answer.
- Quick question, "Yes" or "No" answer needed. Sticky-note on desk or computer screen. Wait for answer or a wave-off. Both agreed to tolerate a wave-off.
Your plan may vary, of course. Just plan and talk about it.