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