Through the Solutions & Interoperability Lab, Avaya issues application notes for non-Avaya product integration with Avaya products. These include application notes for particular models of third-party SIP telephones. You can search and download those application notes the Avaya DevConnect web site (https://www.devconnectprogram.com/).
Beyond basic call handling through the IP Office as listed below, the features available will vary between SIP devices and Avaya cannot make any commitments as to which features will work or how to configure the features.
Answer calls
Make calls
Hang Up
Hold
Unsupervised Transfer
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Supervised Transfer
Voicemail Collect
Set Forwarding/DND
Park/Unpark
Hear Page Calls
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