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Table 82 LED description
LINK/ACT
• On means carrier signal has been received.
• Flashing means data is being received or/and transmitted.
• Off means no carrier signal has been received.
LP/AL
• On means the interface is in a loopback.
• Flashing means an AIS, LFA, or RAI alarm signal is present.
• Off means no loopback or alarm is present.
Note:
LFA = Loss of frame alignment; AIS = Alarm indication signal; RAI = Remote alarm indication.
Fiber ports, optical fibers, and the connection method
For more information about fiber ports, optical fibers, and the connection methods, see "Fiber port."
MIM-IMA-8E1
Introduction
The 8-port E1 ATM inverse multiplexing interface module (MIM-IMA-8E1) provides four/eight E1
interfaces that support the IMA (inverse multiplexing for ATM) technology.
The 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 commonly used in
plesiochronous digital hierarchy (PDH) networks to transport ATM cells.
Interface specifications
Table 83 Interface specifications
Item Specification
Connector DB68
Number of
connectors
1
Interface
standard
ITU-G.703, ITU-G.704
Interface rate 2.048 Mbps
Cable type 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 (ATM adaptation layer 5)
Protocol PPPoA, PPPoEoA, IPoA, IPoEoA
Service type CBR/VBR-rt/VBR-nrt/UBR
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