the problem with hiring someone to answer the phones is they won't know their stuff. I don't want to call and ask a technical question and get "uhh, shit, hold on let me find out. if they will work, how many you want?"
it's not always as simple as just taking orders. Business suffers when you gain a reputation of "unreachable", but business also suffers when you have to run to the phone a hundred times a day instead of welding up an overdue bumper. the key is finding the balance, and not paying attention to the people who have their panties in a wad from an unanswered phone call. If it takes me a week to get through, then they either don't want my money, or it's a busy week. Which do you think it is?