3com MSR 20 Manual Do Utilizador
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.
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
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.
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.
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.
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.
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.
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.
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.
routers need to be equipped with a SIC-1VT1 interface card.
Interface Attributes
R outer
N etw ork
devices such
as D D N
devices such
as D D N
D B-15
N etw ork interface connector
R J-4 5
R J-4 5
1 20 -o hm b a la nc ed tw iste d pa ir
120-ohm E1 trunk cable
Table 23 Interface Attributes of the SIC-1T1-F
Attribute Description
Connector RJ45
Number of connector
1