Sennheiser TeamConnect Ceiling 2 ES1 Ceiling Audio Solution TeamConnect Ceilin - Page 11

Application Guide ES-1 Audio System Set-up Guide for Microsoft Teams After selecting the audio device in the Microsoft Teams Room settings, the MTR uses USB Human Interface Device (HID) signaling to proxy call status and controls to the processor. HID functions are always active in the MTR and in the EX-440C. HID synchronizes the call status and microphone privacy state with the LEDs on the TCC2. Privacy Mic Mute status and Call Status are synchronized through the EX-440C USB Out block. The volume level of the USB In block is controlled by the loudspeaker volume adjustments in the user interface. The following table describes the USB HID synchronization functions and affected parameters. MTR Function EX-440C Block Parameter Changed by HID signal Privacy Mic Mute USB Output Mute Call Status USB Output Status Logic Port Loudspeaker Volume USB Input Volume Level The M1 and M2 logic port on the bottom of the USB Out block correspond to microphone mute; and S associates with call status. HID mute and volume synchronize both USB channels. To enable control of the TCC2 LEDs, the logic ports from the bottom of the USB Out block are wired to M and S on the TCC2 GPO block as shown in Figure 14. Figure 14 Logic wiring from the USB Out block to the TCC2 GPO block Only the input to the MTR is muted at the USB output. The mic does not mute even though the LEDs on the TCC2 change color. The following table summarizes the port function and default state for each HID operation: Function Logic Port State Default TCC2 LED Color/State Call not connected S Low Off Call connected S High On Unmute M1/M2 Low Green Mute M1/M2 High Red April 2020 Page 4