4000 Router Series Interface Module Guide

Interface LEDs

MIM-1ATM-OC3 panel is shown in the following figure:

Figure 42 MIM-1ATM-OC3 panel

The following table describes the LEDs on the MIM-1ATM-OC3 panel.

Table 65 Description for the LEDs on the MIM-1ATM-OC3 panel

LED Descri

tion

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

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 attributes

The following table describes the interface attributes of the MIM-IMA-4E1/MIM-IMA-8E1 module:

Table 66 Interface attributes of the MIM-IMA-4E1/ MIM-IMA-8E1

Attribute Description

Connector DB68

Number of

connectors

Interface standard

ITU-G.703, ITU-G.704

Interface rate 2.048 Mbps