Switching module with automatic switching to call, for two video speech units, for use with power supply units 6680 and 6680/V03 and harness 0002/690, option of installing more than two switching modules in series for the connection of several speech units: provide one M832 or 0832/030 transformer for each additional switching module, programmable outputs for various functions: audio only, call priority etc., installation on DIN rail (60715 TH35), occupies 12 modules size 17.5 mm
