I've reinstalled Elastix 1.5.2-2. Connected One Grandstream 1200 (ext 200) Two Snom 360 (ext 201 & 202) and One Snom 320 (ext 203) When I call from extension 201 to 202 the telephone displays "Service Unavailable 202" When I call from extension 201 to 200 the call is forwarded to VM immediately. The phone doesn't ring. All was fine until I changed the Admin password. So I reinstall elastix and restore an old backup. Any help would be appreciated.