RN-001029-00, Rev 03, Release 2.1 1SIP IP PhoneModels 53i, 55i, 57i, and 57i CTRelease Note 2.1About this DocumentThis document provides an overview of the 2.1 features on the 5i Series phones(53i, 55i, 57i, and 57i CT).For more detailed information about the features associated with each phone, andfor information on how to use the phones, see your model-specific SIP IP PhoneInstallation Guide and the SIP IP Phone User Guide. For detailed informationabout more advanced features, see the SIP IP Phone Administrator Guide.Topics in this release note include:• General Information(release content, hardware supported, bootloader requirements)• Changes in Release 2.1, Build 2145— Usability Features— Deployability Features— Security Features— XML Features— Sylantro Interoperability Features— Broadsoft Interoperability Features— Other Interoperability Features• Issues Resolved on Series 5i Phones in Release 2.1, Build 2145• Contacting Aastra Telecom Support
