I've learnt that new VVX line has a new expansion module, EM 50 (supported by VVX 450 only).
I don't seem to be able to find more information about it other than it would need recenlty released 5.8.2 software, supports USB and has 30 keys/3 pages.
Link on your web-site
Could you shed more light on this product?
welcome to the Polycom Community.
I am not 100% sure this is yet GA but I reported the missing link internally
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Polycom Global Services
Looks like there's finally a new page created with another URL: