Router 4-Port E1 Ima Fic; Introduction; Interface Attributes - 3Com 3C13886 - Router OC-3 ATM SML Flexible Interface Card Installation Manual

3Com Router Module Guide
4.12

ROUTER 4-PORT E1 IMA FIC

4.12.1

Introduction

ROUTER 4-PORT E1 IMA FIC, the 4port E1 ATM inverse multiplexing interface card
provides four or eight E1 interfaces that support inverse multiplexing for ATM (IMA)
technology.
IMA technology distributes an ATM cell stream over multiple low-speed links on a cell
by cell basis and reassembles the cells into the original stream at the far end. It is a
cost-effective way for you to transmit high-speed ATM cell streams over low-speed
links while allowing for great flexibility.
This technology is common on a PDH network over which ATM cells are transmitted.
4.12.2

Interface Attributes

The following table describes the interface attributes:
Table 4-27
Attribute
Connector
Number of
connectors
Interface standard
Interface rate
Cable type
Cable characteristic
impedance
Max transmission
distance
Operating mode
Supported service
Protocol
Transmission rate
Interface attributes of the ROUTER 4-PORT E1 IMA FIC
ROUTER
4-PORT E1 IMA
FIC (75-ohm)
DB-68
1
ITU-G.703, ITU-G.704
2.048 Mbps
75-ohm 8E1 conversion cable
75-ohm
500 m (1640.4 feet)
ATM E1 independent link /IMA bundle mode
AAL5
PPPoA, PPPoEoA, IPoA, IPoEoA
CBR/VBR-rt/VBR-nrt/UBR
Description
(75-ohm) 4-PORT E1 IMA
FIC (120-ohm)
120-ohm 8E1 conversion cable
120-ohm
150 m (492.1 feet)
4-44
Chapter 4
ROUTER
(120-ohm)