Remote control console 27, 7 mute button, Line 1: agc on tgl next back – Telex C-2002 User Manual
Page 33: Line 1: tx enabled tgl next back, Line 1: unsel locked tgl next back, Mute2 = 1 seconds latch edit next back, Mute1 = latched timed next back, 6 automatic gain control (agc) enable/disable, 7 tx enable/disable per line, 8 forced unselect of a line
