What are expansion modules – Aastra Telecom AastraLink Pro 160 User Manual
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What Are Softkeys and How Do They Work?
41-001190-02 Rev. 01, Rel. 1.2
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AastraLink FAQs
What are Expansion Modules?
The 675xi Series Aastra IP SIP Phones offer expansion module units that can
attach to the right side of the phone to provide additional softkeys. These
expansion modules are called the 536M and the 560M.
Model 536M
For Phones 6753i, 6755i, 6757i, and 6757i CT
Model 560M
For Phones 6755i, 6757i and 6757i CT