3Com Router Module Guide
Chapter 3 Multifunctional Interface Modules
3-56
Description
Item
ROUTER
4-PORT E1 IMA
MIM (75-ohm)
ROUTER
4-PORT E1 IMA
MIM (120-ohm)
Connector quantity
One
Interface standard
ITU-G.703, ITU-G.704
Interface rate
2.048 Mbps
Cable type
E1 coaxial cable
Shielded twisted pair
Cable characteristic
impedance
75 ohm
120 ohm
Max transmission
distance
500 m (1640.4 in.)
150 m (492.1 in.)
Operating mode
ATM E1 standalone link /IMA binding mode
Service AAL5
Protocol
PPPoA, PPPoEoA, IPoA, IPoEoA
Transmission rate
CBR/VBR-rt/VBR-nrt/UBR
3.14.4 Panels and Interface LEDs
The following figures show the panels of the ROUTER 4-PORT E1 IMA MIM interface
cards:
Figure 3-60
Front panel of the 75-ohm ROUTER 4-PORT E1 IMA MIMinterface card
Figure 3-61
Front panel of the 120-ohm ROUTER 4-PORT E1 IMA MIMinterface card