4000 Router Series Interface Module Guide

Interface LEDs

MIM-8E1 and MIM-8E1-F panels are similar. The following figures illustrate MIM-8E1 panels.

Figure 49 MIM-8E1 (75-ohm) panel

Figure 50 MIM-8E1-F (75-ohm) panel

The following table describes the LEDs on the MIM-8E1/MIM-8E1-F panel:

Table 75 Description for the LEDs on the MIM-8E1/MIM-8E1-F 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:

AIS = Alarm indication signal; LFA = loss of frame alignment; RAI = Remote alarm indication

Interface cables and the connection methods

For more information about E1 interface cables, see "E1 interface."

MIM-2T1/MIM-4T1-F

Introduction

• MIM-2T1

2-port channelized T1/PRI interface module (MIM-2T1) serves to transmit/receive and handle T1

data streams, provide CT1 access, and fulfill the function of ISDN PRI. Thereby, one module can

be used for multiple purposes.

• MIM-4T1-F

4-port fractional T1 interface module (MIM-4T1-F) and MIM-2T1 module are different in the sense

that:

{ FT1 operating mode supported by T1-F modules allows only one bundle. In other words, the

time slots can only be bundled into one n x 64 kbps or 56 kbps channel, where n=1-24.

However, a CT1 module allows of arbitrary grouping of the 24 channels;

{ T1-F does not support PRI mode.