X.500-like Directories provide white pages service to 4th Generation Telephony users
The same technology can be used to track the location of users allowing personal and terminal mobility
Flexible enough to allow multiple naming and addressing schemes as well as interworking with legacy (CSN) systems
Can play an important role in facilitating authentication and confidentiality services
LDAPv3 Dynamic Entries are supported
Current prototype uses Standalone LDAP Servers (LDAP) in conjunction with the standard Internet Domain Name Service (DNS).