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FIC-IMA-4E1/FIC-IMA-8E1
Introduction
The 4-port/8-port E1 ATM inverse multiplexing interface module (FIC-IMA-4E1/FIC-IMA-8E1)
provides four/eight E1 interfaces that support the IMA (inverse multiplexing for ATM) technology.
IMA technology combines multiple low-speed links into a group to support a high-speed ATM cell
stream. It distributes an ATM cell stream over multiple low-speed E1 links on cell by cell basis at the
transmission end and reassembles the cells on the low-speed E1 links into the original stream at the
far end. This technology provides a scalable and cost-effective solution, and is typically used in PDH
networks to transport ATM cells.
Interface specifications
Table 177 Interface specifications
Item
Connector D68
Number of connectors 1
Interface standard ITU-G.703, ITU-G.704
Interface rate 2.048 Mbps
Cable type 75-ohm 4E1 conversion cable 75-ohm 8E1 conversion cable
Max transmission
distance
500 m (1640.4 ft)
Operating mode ATM E1 independent link/IMA bundle mode
Supported service AAL5
Protocol PPPoA, PPPoEoA, IPoA, IPoEoA
Transmission rate CBR/VBR-rt/VBR-nrt/UBR
Interface LEDs
Figure 132 75-ohm FIC-IMA-4E1 panel
Figure 133 75-ohm FIC-IMA-8E1 panel
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