General Information
2 RN-001029-00, Rev 06, Release 2.2
IP Phone Release Notes 2.2
General Information

Release Content Information

This document provides release content information on the Aastra 51i, 53i, 55i,
57i, and 57i CT SIP IP phone firmware.

Hardware Supported

This release of firmware is compatible with the following Aastra IP portfolio
products:
•51i
•53i
•55i
•57i
•57i CT

Bootloader Requirements

This release of firmware is compatible with the following Aastra IP portfolio
product bootloader versions:
• 51i - Bootloader 2.0.1.1055 or higher
• 53i - Bootloader 2.0.1.1055 or higher
• 55i - Bootloader 2.0.1.1055 or higher
• 57i - Bootloader 2.0.1.1055 or higher
• 57i CT - Bootloader 2.0.1.1055 or higher
Model Release Name Release Version Release Filename Release Date
51i Generic SIP 2.2 FC-001126-00-06 March 2008
53i Generic SIP 2.2 FC-001086-00-09 March 2008
55i Generic SIP 2.2 FC-001087-00-09 March 2008
57i Generic SIP 2.2 FC-001088-00-09 March 2008
57i CT Generic SIP 2.2 FC-001089-00-09 March 2008