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SIC-1VT1 49
If the remote device has 120-ohm interface, it is needed to use a
75-ohm-to-120-ohm adapter or use a 120-ohm cable.
2 When the E1 cable is a 120-ohm balanced twisted pair cable:
■ Directly connect the RJ-45 connector of the cable to the RJ-45 port of the
remote equipment, if there is no need to extend the E1 cable, or
■ Connect the RJ-45 connector of the cable to the network connector and the
other end of the network connector to the network equipment through a
120-ohm E1 trunk cable, if cable extension is needed.
Figure 44 Extending an E1 120-ohm balanced twisted pair cable
Step 4: Check the status of LINK LED on the SIC-1VE1 panel: ON means the link is
connected and OFF means the link is not connected. In the latter case, check the
line.
SIC-1VT1
Introduction 1-port T1 voice interface card (SIC-1VT1) can handle dense voice signals in VoIP
system. It provides a CT1/PRI/R2 port, allowing the access of 23 channels of voice
signals.
n
■ When purchasing a SIC-1VT1 interface card, users should purchase a VCPM
and configure a VPM based on voice traffic.
■ No VCPM is required, but only a VPM needs to be installed on the main board
when MSR 20-1x series routers need to be equipped with a SIC-1VT1 interface
card.
■ VCPM and VPM need to be installed on the main board when MSR 30 series
routers need to be equipped with a SIC-1VT1 interface card.
■ VCPM and VPM need to be installed on the MSCA card when MSR 50 series
routers need to be equipped with a SIC-1VT1 interface card.
Interface Attributes
Router
Network
devices such
as DDN
DB-15
Network interface connector
RJ-45
RJ-45
120-ohm balanced twisted pair
120-ohm E1 trunk cable
Table 23 Interface Attributes of the SIC-1T1-F
Attribute Description
Connector RJ45
Number of connector 1