An access director provides a gateway for customer premise based equipment (both wired and wireless) and a wireless port facility to a narrowband/broadband information distribution network. It provides a portable narrowband duplex synchronous and isochronous telephony service and concurrent broad fixed...http://www.google.com/patents/US5642348?utm_source=gb-gplus-sharePatent US5642348 - Access director interface for narrowband/broadband information distribution network
