I've read that there is a module for SER to support LDAP. But it is not used for authentication/authorization, it's used for translating phone numbers to URI adresses and the opposite. That module is for SER 0.8.x. I would like to know if it is possible making the authentication of UAs in a LDAP tree instead of in a POSTGRESQL db in newer SER versions. Where can I find documentation about this? I tryed to find documents but it was not easy. Sorry about my bad English... :) Thanks Marco Passarinho