3Com MSR 50, MSR 30, MSR 20 manual MIM-1CT3 Module, Description of the LEDs on the MIM-1CE3 panel

98CHAPTER 3: MULTIFUNCTIONAL INTERFACE MODULES

Table 57 Description of the LEDs on the MIM-1CE3 panel

LED	Description
LINK	OFF means the link is not set up. ON
	means the link has been set up.
ACT	OFF means no data is being
	transmitted or received; blinking
	means data is being received or/and
	transmitted.

Interface Cable The external interface provided by a MIM-1CE3 module is two SMB sockets respectively for Tx (Transmitter end) and Rx (Receiver end). The interface adopts 75ohm unbalanced transmission mode and uses a pair of 75ohm unbalanced coaxial cables to connect the peer device.

Figure 111 E3/T3 cable

BNC connector SMB connector

n	■	MIM-1CE3 and 1CT3 adopt the same cable, which is called E3/T3 cable in this
		manual.
	■	The standard shipment package of MIM-1CE3 does not include the interface
		cable.

Connecting the Interface

Cable

c CAUTION: Some measures have been taken to protect the MIM-1CE3 module. To achieve better lightning protection effects, however, you are recommended to add a special lightning arrester at the input end of the E3 or T3 cable when it is led outdoors.

Step 1: Connect the SMB connector of an E3 or T3 cable to the Tx port of

MIM-1CE3 and another end to the Rx port of the device to be connected;

Step 2: Connect the SMB connector of another E3 or T3 cable to the Rx port of

MIM-1CE3 and another end to the Tx port of the peer device;

Step 3: Check the behavior of the LINK LED on the MIM-1CE3 panel. It is OFF when the line is faulty and signal is out of synchronization. In this case, check the link.

MIM-1CT3 Module

Introduction 1-port channelized T3 interface module (MIM-1CT3) serves to: