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RN-001029-00, Rev 04, Release 2.1.1 1
SIP IP Phone
Models 51i, 53i, 55i, 57i, and 57i CT
Release Note 2.1.1
About this Document
This document provides an overview of the 2.1.1 features on the 5i Series phones
(51i, 53i, 55i, 57i, and 57i CT).
For more detailed information about the features associated with each phone, and
for information on how to use the phones, see your model-specific SIP IP Phone
Installation Guide and the SIP IP Phone User Guide. For detailed information
about more advanced features, see the SIP IP Phone Administrator Guide.
Topics in this release note include:
• General Information
(release content, hardware supported, bootloader requirements)
• Features in Release 2.1.1
• Issues Resolved on Series 5i Phones in Release 2.1.1, Build 65
• Contacting Aastra Telecom Support