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IMA Last modified: Thursday, June 20, 2002
Short for inverse multiplexing over ATM. IMA is a physical layer technology in which a high-speed stream of ATM cells is broken up and transmitted across multiple T1/E1 links, then is reconstructed back into the original ATM cell order at the destination. For companies with low to mid-range WAN requirements, the purchase of costly T3/E3 access is not a viable solution. IMA divides an aggregate stream of ATM cells across multiple T1/E1 WAN links on a cell-by-cell basis, mimicking the behavior of transmissions across T3/E3 lines. IMA is a User-to-Network Interface standard approved by the ATM Forum in 1997.
The ATM Forum  The ATM Forum site is dedicated to promoting ATM within various markets. There are links to general information about the forum and its members, along with ATM technical and marketing information.	Related Categories Networking Standards Related Terms cell relay DLCI Ethernet FDDI Frame Relay Internet IP switching MPOA PON QoS TCP/IP User-to-Network Interface (UNI)