3Com Router Module Guide
Chapter 4
4-47
Step 3: Identify the sequence number of the other end of the 4E1/8E1 conversion
cable and connect it with the intended device.
Step 4: Power on the router. Check the behavior of the LINK LED for the slot on the
card panel: OFF means that fault has occurred on the line and signal is out of
synchronization. Check the link status.
4.13
ROUTER 4-PORT T1 IMA FIC
4.13.1
Introduction
ROUTER 4-PORT T1 IMA FIC, the 4-port T1 ATM inverse multiplexing interface card
provides four or eight T1 interfaces that support the IMA technology. Their network
application is similar to that of the ROUTER 4-PORT E1 IMA FIC card.
4.13.2
Interface Attributes
The following table describes the interface attributes of the ROUTER 4-PORT T1 IMA
FIC:
Table 4-29
Interface attributes of the ROUTER 4-PORT T1 IMA FIC
Description
Attribute
ROUTER 4-PORT T1 IMA FIC
Connector DB-68
Number of
connectors
1
Interface standard
ITU-G.703, ITU-G.704
Cable type
8T1 conversion cable
Cable characteristic
impedance
100-ohm
Max transmission
distance
150 m (492.1 feet)
Operating mode
ATM T1 independent link/IMA bundle mode
Supported service
AAL5
Protocol
PPPoA, PPPoEoA, IPoA, IPoEoA
Transmission rate
CBR/VBR-rt/VBR-nrt/UBR