Hello Matija,
welcome to the Polycom Community.
Using the VoIP Community Search I found the following 2 results in addition to your post => here <=
Could you provide more details on your query why you are after an explanation of the above and what handset you are using and what software you are running?
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
Polycom Global Services
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Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
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