H3C Technologies H3C MSR 50 - Manual (Page 209)

4-14
Figure 4-17 120-ohm 8E1 conversion cable
Connecting the interface cable
Step1 Choose a 4E1/8E1 conversion cable appropriate to the interface type of the peer device to be
connected.
z
If the interface impedance of the peer device is 75 ohm, use a 75-ohm 4E1/8E1 conversion cable.
z
If the interface impedance of the peer device is 120 ohm, use a 120-ohm 4E1/8E1 conversion
cable.
Step2 Insert the DB-68 connector at one end of the 4E1/8E1 conversion cable to the DB-68 port on the
FIC-IMA-4E1/FIC-IMA-8E1 module, and fasten the cable retaining screws.
Step3 Identify the sequence numbers of the connectors at the other end of the 4E1/8E1 conversion cable
and connect one connector (or a pair of connectors) to the peer device.
Step4 Power on the router. Check the behavior of the LINK LED for the slot on the module panel: OFF
means the line has problem and signal is out of synchronization. Check the link status.
FIC-IMA-4T1/FIC-IMA-8T1
Introduction
The 4-port/8-port T1 ATM inverse multiplexing interface module (FIC-IMA-4T1/FIC-IMA-8T1) provides
four/eight T1 interfaces that support the IMA technology. Their network application is similar to that of
the FIC-IMA-4E1/FIC-IMA-8E1 module.
Interface attributes
The following table describes the interface attributes of the FIC-IMA-4T1/FIC-IMA-8T1:
Table 4-13 Interface attributes of the FIC-IMA-4T1/FIC-IMA-8T1
Description
Attribute
FIC-IMA-4T1 FIC-IMA-8T1
Connector DB-68
Number of connectors 1
Interface standard ITU-G.703, ITU-G.704
Cable type
4T1 conversion cable (100-ohm
straight-through shielded) 8T1 conversion cable (100-ohm
straight-through shielded)
Max transmission
distance
150 m (492.1 ft.)
Operating mode ATM T1 independent link/IMA bundle mode