how the requirements comes in this situation....can anybody guess ...

if there is a communications company, providing communication services to residential and business customers.

and the services include local, long distance and wireless phone services, high-speed and wireless Internet access, IP-broadband services, information and communications technology services (or value-added services) and direct-to-home satellite and VDSL television services. Other BCE holdings include Telesat Canada, a pioneer and world leader in satellite operations and systems management.

....How the requirements comesto design interfaces.....can anybody give me some situations the requirements come ..