Got the call to my office. Picked up. Hit 1 to talk to the operator. Told him to hold a minute. Turned on the speaker on the base unit. Turned on the speaker on the handset. Placed the handset facing the base to create a feedback loop.
I think he got the message.
Called one of our cell phones. Left no message on voice mail. [Note: we have been getting several "google scam" calls, and they call from different lines. We block the numbers as they show up on Caller ID.]