NEC UNIVERGE UM8000 User Manual page 177

Subscriber Guests
Use the Subscribers > Guest page to create subscriber guest profiles. When subscriber guests are created the host
subscriber provides a personalized messaging system experience for clients, contacts, friends, or family. These callers
are enrolled on the system as guests of the subscriber and are greeted by name and have direct access to exchange
messages with their host.
Guests are limited to leaving messages for their host. If a guest wants to leave a message for another subscriber or try
a different extension, the guest must dial the external number.
See
Managing Subscriber Guests
Configuring Guest Message Notification
Subscriber Guests 177