Connecting accessories to Konftel 300

Wireless headset	Can any wireless headset be connected to the Konftel 300? We recommend GN/Jabra 9350, 9120 and Plantronics CS70N.  Once a wireless headset has been connected to Konftel 300, can it be used for answering? No  When would you want to use a headset with a conference phone? When someone is standing and speaking at a distance from the other conference participants, for instance, in front of a whiteboard.  A headset can help enhance the sound for this person. A headset allows people with hearing impairments to hear sounds from the other extensions directly in their ear.  How can I upgrade my Konftel 300 so I can connect a wireless headset?   Konftel 300 have headset connection as standard. Earlier revisions can download a free software from here  Installation guide (pdf)
Expansion microphones	Does the Konftel 300 microphone switch off when extra microphones are connected to Konftel 300? No, as opposed to the other Konftel models, all three microphones are used.
PA system	What output is used for the head and PA system respectively? The AUX port. If you intend to use both the wireless headset and PA system at the same time, connect the headset to the PA system.