I worked with three or four others in a small office for many years. If the person who normally answered phones was tied up, we all pitched in and answered the phone. The owner's calls were screened. If he didn't want to talk to someone we had to take a message. It went something like this:
Customer: "Is Bob in?"
Me: "Please hold the line while I check. Can I say who is calling?"
Boss: "Take a message."
Me: "Bob's not at his desk right now, can I take a message?"
Many of the callers were familiar with our office layout and where I sat. From my office I had practically a clear view of the entire building. So the instant I asked the caller if they could hold the line while I check, they knew the call was being screened. Most were polite and went along with the game. Some called me out on the carpet. But I always mumbled something and did the diplomatic thing, which for the record I hated. When I became boss in another operation, I answered almost every call.
Apparently that wasn't enough. The duration of time that I screened calls must have been greater than when I didn't. Because as karma goes, I'm in the hole. I can't tell you how many times that since I have becomed disabled, my calls get screened.
Of course there's another factor that I didn't have to deal with years ago:
Caller: "Is Bob in?"
Office: ""Please hold the line while I check. Can I say who is calling?"
Caller: "Never mind. I'll call him on his cell."

