This is a good moment for mission-based organizations to remember that a telephone system is a strategic information and communication technology system:

"...Jane is looking for her missing father. She calls CLO’s toll-free number and enters his usual telephone number. She can then leave a voice message for him or listen to messages from him. When her father calls the toll-free number, he enters his own phone number. He can then leave a message for other callers to hear saying he is safe and how he can be contacted or he can listen to messages left for him..."   more »