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3Com Router 5000 and Router 6000 v2.41
Module Guide
Chapter 4 Flexible Interface Cards (Router 6000)
4-28
Step 5: Power on the router, and check the behavior of the LINK LED on the card
panel: OFF means fault occurs on the line and the signal is not synchronized. Check
the line status.
4.8 Router 4-Port CT1/PRI FIC and Router 4-Port Fractional
T1 FIC
4.8.1 Introduction
I. Router 4-Port CT1/PRI FIC
Router 4-Port CT1/PRI FIC, the 4-port channelized T1/PRI interface card, transmits,
receives, and processes T1 data traffic. In addition, you can use the card for other
purposes, such as CE1 access and the ISDN PRI function.
II. Router 4-Port Fractional T1 FIC
Router 4-Port Fractional T1 FIC, the 4-port fractional T1 interface card, differs from the
Router 4-Port CT1/PRI FIC primarily in the sense that:
z The FT1 operating mode supported by the T1-F cards allows only one n x 64
kbps or n x 56 kbps bundle to be formed on each interface, where n = 1 to 24.
However, a T1 card allows arbitrary grouping of 24 channels and multiple
bundles.
z The T1 cards do not support PRI mode.
4.8.2 Interface Attributes
The following table describes the interface attributes of the cards.
Table 4-17 Interface attributes of the cards
Attribute Description
Connector
RJ-45
Number of connectors
1
2
4
Interface standard
G.703/T1 102, G.704
Interface rate
1.544 Mbps
Cable type
T1 cable (100-ohm straight-through shielded cable)
Operating mode
CT1, ISDN PRI (only supported by the cards)
FT1 (only supported by the cards)