Ecler ECLERNET MANAGER - Manual (Page 106)

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MUTE OFF for input 5 – output 3 (send enabled) MUTE ON for input 5 –output 3 (send disabled)
 X-FOCUS MUTE: not available when the WPTOUCH manages a carousel list of Presets.
See 7.10.1.2 WPTOUCH configuration to operate with a carousel of inputs
 GPO: activation/deactivation of one of the MIMO88's GPO relays. In the WPTOUCH LCD,
an asterisk appears when the function is activated and disappears when the function
is deactivated (by successively pressing T1):