Interestingly not all Skype for Business endpoints handle answering Response Group Service / Call Queue calls with the same logic. When multiple calls are coming from a RGS /Call Queue, which will be answered?
For example: Let’s say you have 3 incoming calls from your “FrontDesk” Response Group (or Cloud PBX Call Queue). On your Skype for Business client you will see 3 incoming call toasts. If you press the button on your USB headset, which call will be answered? (LIFO = Last Incoming Call/Oldest Incoming/Longest Ringing will be answered first. FIFO = First Incoming Call/Newest Incoming/Shortest Ringing will be answered first.)
|Skype for Business endpoint||Answer Method||Behavior|
|Skype for Business PC client||[Window + Shift + O]||LIFO|
|USB headset||Headset button||LIFO|
|Polycom CX300 USB||Pickup handset||LIFO|
|Yealink IP phone||Pickup handset||LIFO|
|Lync Phone Edition IP Phone (Polycom CX600/HP 4120/etc)||Pickup handset||FIFO|
Of course, if you click on a specific incoming call toast, that call will be answered.
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