This is a time of less competition. The switchboard is dead And the receptionist is bored. With fewer calls coming in, it's easier to strike up a conversation with the person who answers the phones. Ask for information, names, advice, contacts . The place is quiet.
Nerves are calm.
Information is more easily had. Do some research , and be prepared to have a smart discussion with the manager you'd like to work for. I've heard a lot about you. Your company is one I think I'd want to work in, and I wanted to learn about the organization. By the way, congratulations on winning the XYZ deal.