3Com MSR 50, MSR 30, MSR 20 manual Interface attributes of the FIC-IMA-4E1/FIC-IMA-8E1

212CHAPTER 4: FLEXIBLE INTERFACE CARDS

■Ensure that the fiber ends are clean.

w WARNING: Laser danger: Invisible laser radiation may be emitted from the fiber-optic ports which are connected to lasers. To protect your eyes against radiation harm, never stare into an open fiber-optic port.

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.

Connecting Ethernet electrical cable

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.

FIC-IMA-4E1/FIC-IMA-8

E1

Introduction 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.

Interface Attributes 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

	Description
	FIC-IMA-4E1	FIC-IMA-8E1FIC-IMA-4E1 (120-ohm)	FIC-IMA-8E1
Attribute	(75-ohm)	(75-ohm)	(120-ohm)
Connector	DB-68
Number of	1
connectors
Interface standard	ITU-G.703, ITU-G.704
Interface rate	2.048 Mbps