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Exit Any Menu Field Operation Or Display Press Cancel as many times as required to return to the desired menu level or press Home to return to the main menu. 3-8 TSU 600 User Manual 61202076L1-1 Chapter 3. Operation Data Port Identification When configuring the unit, menu selections will include options from data port submenus. Selecting of data ports is necessary because the TSU 600 uses a Slot-Port method to identify which data port the menu item is referencing. If a module containing a PBX DS