General
			The 
			grouping of products with a common frame and mains power supply 
			benefits the user by providing economy and maximum utilisation of 
			valuable space. 
			Different modules, including digital and analogue, may be mixed in 
			the one frame to provide a compact solution to system design and 
			ease of later expansion.
			Provision is made for two power suplies for redundancy, although the 
			frame can be used with only a single supply.
			With two supplies fitted, the FRU-4001 will take up to 10 IRT 
			current series Eurocards. If only a single supply is fitted, the 
			maximum number of Eurocards icreases to 12 by removing the second 
			power supply rear assembly.
			When 
			fitted with a CDM-4001 SNMP 
			Agent module the FRU-4001 frame has the added capability of Simple 
			Network Management Protocol (SNMP) monitoring and control. The
			CDM-4001 has its own designated 
			slot and does not affect the number of modules that can be loaded 
			into the frame. 
			
			SNMP allows remote monitoring and control of modules via an Ethernet 
			connection by a computer using third party Network Management 
			Software. Modules must be fitted with their own relevant Management 
			Information Base (MIB) sub modules.
			
			The FRU-4001 frame will take all IRT 4000 series Eurocards as well 
			as current 700 and 3000 series Eurocards that have the correct type 
			of power connector on the rear assembly.