# Download Documentation You can view or download Oracle Communications Services Gatekeeper documentation as Adobe Acrobat PDF (Portable Document Format). Don't have Adobe Acrobat Reader? It's free! Get Adobe Reader.
## PDF files Release Notes for Release 4.1.1 Release Notes for Release 4.1 Concepts and Architectural Overview Communication Service Reference Licensing Statement of Compliance Installation guide System Administration Guide System Backup and Restoration Guide Managing Accounts and SLAs Handling Alarms Application Development Guide RESTful Application Development Guide Platform Test Environment SDK User Guide Partner Relationship Management Guide Platform Development Studio - Developer’s Guide | ##