3Com Router Module Guide
Chapter 3 Multifunctional Interface Modules
3-55
may due to the host or the Router NDEC2 Encryption Accelerator MIM, contact our
agents for support.
3.14 ROUTER 4-PORT E1 IMA MIM
3.14.1 Introduction
The ROUTER 4-PORT E1 IMA MIM interface card provides four E1 interfaces that
support inverse multiplexing for ATM (IMA) technology. The IMA technology is a
method to multiplex many low-speed links to one high-speed ATM cell flow: the
transmission end splits the cell flow of the ATM set to many low-speed E1 links, and
the remote end multiplexes these low-speed E1 links to one single cell flow. This
technology is cost-effective and flexible for application and mainly used in network
applications that transmit ATM cell through p
lesiochronous digital hierarchy (
PDH
)
network.
3.14.2 Appearance of the Interface Card
The following figure shows the appearance of the ROUTER 4-PORT E1 IMA MIM
interface card:
Figure 3-59
Appearance of the ROUTER 4-PORT E1 IMA MIM interface card
3.14.3 Interface Attributes
The following table describes the ROUTER 4-PORT E1 IMA MIM interface attributes:
Table 3-34
ROUTER 4-PORT E1 IMA MIM interface attributes
Description
Item
ROUTER
4-PORT E1 IMA
MIM (75-ohm)
ROUTER
4-PORT E1 IMA
MIM (120-ohm)
Connector type
DB68
