Apparently the trough has a phone.

After the third fat bastard of the day customer called for support while eating, I mentioned my annoyance with it to my sysadmin, aka my boss.

His advice? "Put them on hold. Check back with them after five minutes. Repeat. When they ask you why you keep putting them on hold, let them know it's hard for you to understand them while they are eating and you're waiting for them to finish."

Have I mentioned how much I love my work? (grin)