A bakery that we visited had this Yealink IP phone in their office area. This is a compact SIP based IP phone with two lines and simple SIP based features such as Hold, Conference, Transfer, and Park. I assume this phone is connected to their much larger facility in the suburbs. Usually these Yealink phones are connected to an open standards IP PBX system such as Asterisk. Yealink might want to update the firmware to say “3 Missed Call”, with the addition of an “s” on calls.