I am considering getting a phone system for my home, and I like the designs of Avaya's phone and the manuals are readily available online. I would simply like to know if this module will work by itself, and if it will work with the older Avaya phones that are boxy with square buttons. I believe they are called MLX phones.. Any information would be greatly appreciated. Here is the link to the card I am asking about:

https://cgi.ebay.com/Avaya-408-Merl...main_0?hash=item3ef85e3195#ht_500wt_1182

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