3com MSR 20 Manual Do Utilizador

C

HAPTER

 3: M

ULTIFUNCTIONAL

 I

NTERFACE

 M

ODULES

Step 2: Insert the DB68 connector at one end of the 4E1/8E1 conversion cable to 
the DB68 interface on the MIM-IMA-4E1/MIM-IMA-8E1 module, and fasten the 
cable retaining screws.

Step 3: Identify the sequence numbers of the connectors at the other end of the 
4E1/8E1 conversion cable and connect one connector (or a pair of connectors) to 
the peer device.

Step 4: Power on the router. Check the status of the LINK LED on the 
MIM-IMA-4E1/ MIM-IMA-8E1 module panel. OFF means the line has problem and 
signal is out of synchronization. In this case, please check the line.

The 4-port/8-port T1 ATM inverse multiplexing interface module 
(MIM-IMA-4T1/MIM-IMA-8T1) provides four/eight T1 interfaces that support the 
IMA technology. Their network application is similar to that of the 
MIM-IMA-4E1/MIM-IMA-8E1 module.

The following table describes the interface attributes of the 
MIM-IMA-4T1/MIM-IMA-8T1 module.

The following figures illustrate the MIM-IMA-4T1 and MIM-IMA-8T1 panels.

Figure 152   MIM-IMA-4T1 panel

Table 92   Interface attributes of MIM-IMA-4T1/MIM-IMA-8T1

Connector DB68 

Number of connectors 

1 

Interface standard 

ITU-G.703, ITU-G.704 

Cable type 

4T1 conversion cable 
(100-ohm straight-through 
shielded) 

8T1 conversion cable 
(100-ohm 
straight-through shielded) 

Max transmission distance 

150 m (492.1 ft.) 

Operating mode 

ATM T1 independent link/IMA bundle mode 

Supported service 

AAL5 

Protocol 

PPPoA, PPPoEoA, IPoA, IPoEoA 

Transmission rate 

CBR/VBR-rt/VBR-nrt/UBR