The pass through feature of the TimeSource allows the unit to front a DCD product to provide one management interface for a user site. The DCD Pass Through attribute can be set to either DCD communications port 1 (ALW1), port 2 (ALW2), or to Disabled (INH).
DCD User Port attribute represents the TimeSource serial Communications port and can be set to COM-1, COM-2, COM-3, COM-5001, COM-5002, 5003, or COM-5004.