I have been using Linksys SPA 3000 with an Asterisk server with following configuration: Line1: -------- Proxy and registration - Proxy: 192.168.1.100 (asterisk server) Register: YES Subscriber information - Display Name:1000 User ID:1000 Password: my_password When (trying) to register with FS, my settings are Line1: -------- Proxy and registration - Proxy: 192.168.1.101 (FS server) Register: YES Subscriber information - Display Name:1000 User ID:1000 Password: 1234 But.....registration always fails. I've not been able to find out why. When I try to register with a softphone (SJphone) with the same User ID (1000) and a Password (1234) then NO problem. Grds. Henk