3com MSR 20-20 사용자 설명서

MIM-1AT3 Module

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Step 2: Connect the SMB connector of another E3/T3 cable to the Rx port of
MIM-1AE3 module and another end to the Tx port on the device to be connected;

Step 3: Check the behavior of the LINK LED on the MIM-1AE3 panel. It is OFF
when fault has occurred on the link and signal is out of synchronization. In this
case, please check the link.

MIM-1AT3 Module

Introduction

1-port 44.736 Mbps ATM-T3 interface module (MIM-1AT3) supports:

■

Two ATM cell mapping modes: ADM and PLCP;

■

Scrambling in data transmission;

■

Both line clock (when working as DTE interface) and internal clock (when
working as DCE interface);

■

Four types of test measures, i.e., local cell loopback, local payload loopback,
remote payload loopback, and remote line loopback.

You are allowed to equip an H3C Series Router with MIM-AT3 modules to its full
capacity. Yet, you are recommended to install only one MIM-AT3 module on it,
whatever its model is, to ensure the performance of some key services.

Interface Attributes

The interface attributes of MIM-1AT3 are given in the following table:

In the supported services described in the above table, CBR represents Constant
Bit Rate, rt_VBR represents Variable Bit Rate-Real Time, nrt_VBR represents
Variable Bit Rate-Non Real Time, and UBR represents Unspecified Bit Rate.

Interface LEDs

MIM-1AT3 panel is shown in the following figure:

Figure 122 MIM-1AT3 panel

The following table describes the LEDs on the MIM-1AT3 panel:

Table 69 Interface attributes of MIM-1AT3 module

Attribute 1AT3

Module

Connector SMB

Connector number

Interface standard

G.703, G.704, G.823

Interface rate

44.736 Mbps

Cable

E3/T3 cable (75-ohm coaxial cables)

Supported service

ATM Traffic CBR, rt_VBR, nrt_VBR, UBR