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RN-001029-00, Rev 01, Release 2.0 1
SIP IP Phone
Models 53i, 55i, 57i, and 57i CT
Release Note 2.0
About this Document
This document provides an introduction to Aastra’s new 5i Series IP phones (53i,
55i, 57i, and 57i CT), Release 2.0. It also provides a brief overview of the features
on each phone and optional equipment that may be purchased to work with the IP
phones.
For more detailed information about the features associated with each phone, and
for information on how to use the phones, see your phone-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)
• IP Phone Models
• Optional Equipment (for 55i, 57i, and 57i CT only)
• Contacting Aastra Telecom Support
• Contacting Aastra Telecom Support