3com MSR 20 Manual Do Utilizador

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Step 1: Insert the SFP optical module into its corresponding slot.

Step 2: Locate the Rx and Tx ports of the GE interface. Connect them to another 
device with two optical fibers: Rx to Tx and Tx to Rx.

Step 3: Check the status of LINK LED on the GE interface: ON means the link is 
connected and OFF means the link is not connected. In the latter case, check the 
line.

Step 1: (Use a crossover cable for the connection to a PC/router and 
straight-through cable to a Hub/LAN Switch.) Plug one end of the cable to an 
Ethernet port of the Router and another end to the desired peer device;

Step 2: Check the status of LINK LED on the FE module panel: ON means the link is 
connected and OFF means the link is not connected. In the latter case, check the 
line.

The 4-port/8-port E1 ATM inverse multiplexing interface card 
(FIC-IMA-4E1/FIC-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 PDH networks to transport ATM cells.

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

Table 157   Interface attributes of the FIC-IMA-4E1/FIC-IMA-8E1

Connector DB-68 

Number of 
connectors 

1 

Interface standard  ITU-G.703,  ITU-G.704 

Interface rate 

2.048 Mbps