A central aspect of the design of the ccr system is that communication is localized. In most cases, communication occurs via propagating energy. Propagation is confined to the local refspace, typically the room and doors in which the force behind the energy is standing. ccr provides for a small amount of nonlocal communication (ccr mail, the offernet protocol), but these exceptions are not suitable for realtime communication of arbitrary data. Restricting communication to local domains is mostly desirable: if nothing else, it provides an important performance improvement by limiting bandwidth requirements. In addition, local communication provides ccr agents with a certain privacy; if someone is not standing in a room with me, I am reasonably sure they cannot hear me.
However, having only local communication puts constraints on how one communicates. For instance, if I wish to talk to another person I have to walk my ccr body over to a room where the other person is standing before I can speak with them. In addition, local communication restricts what sort of information one can find out about happenings in the ccr universe. Finding someone requires walking through the entire universe, searching for them room by room.
One solution to these limitations is to build a global communication network whereby agents can share their local view of the universe with other similar agents. This network can then be used to circumvent the restrictions of localized communication, thereby conveniently acquiring and exchanging information across the entire ccr universe.