3com MSR 20-20 사용자 설명서
206
C
HAPTER
4: F
LEXIBLE
I
NTERFACE
C
ARDS
Connecting the Interface
Cable
c
CAUTION:
■
Some measures are taken to protect FIC-1VE1 module. Still, you are
recommended to install a special lightning arrester at the input end of its
connection cable to obtain better lightning protection when the cable is led
outdoors;
recommended to install a special lightning arrester at the input end of its
connection cable to obtain better lightning protection when the cable is led
outdoors;
■
Read the mark identifying a port before you connect a cable to it, making sure
it is the correct port. Wrong connection tends to damage the MIM and even
the Router.
it is the correct port. Wrong connection tends to damage the MIM and even
the Router.
Step 1: Plug the DB-15 connector of the cable into the DB-15 port on the
FIC-1VE1 module and fasten the screws;
FIC-1VE1 module and fasten the screws;
Step 2: Connect the RJ-45 connector of the cable to:
■
The peer device directly, if the resistance of the port to be connected is
120-ohm, and there is no need to extend the cable;
120-ohm, and there is no need to extend the cable;
■
A network interface connector and then the peer device using another E1
120-ohm balanced twisted pair cable, if the resistance of the port to be
connected is 120-ohm, and there is a need to extend the cable, as illustrated in
the following figure.
120-ohm balanced twisted pair cable, if the resistance of the port to be
connected is 120-ohm, and there is a need to extend the cable, as illustrated in
the following figure.
Figure 253 Extending E1 120-ohm balanced twisted pair cable
■
The peer device using a 75ohm-to-120ohm adapter, if the resistance of the
peer device is 75-ohm;
peer device is 75-ohm;
Step 3: Power on the Router and check the LINK LED on the FIC-1VE1 panel. It is
OFF when fault has occurred on the link. In this case, please check the link.
OFF when fault has occurred on the link. In this case, please check the link.
FIC-1VT1
Introduction
1-port T1 voice interface module (FIC-1VT1) can handle dense voice signals in VoIP
system. It provides a CT1/PRI port, allowing the access of 24 channels of voice
signals.
system. It provides a CT1/PRI port, allowing the access of 24 channels of voice
signals.
n
■
VCPM is provided to users together with FIC-1VT1. Users can select VPM
module as needed.
module as needed.
■
VPM module is installed on the main board of FIC-1VT1.
Router
Voice
Device
DB -15
Network interface
RJ-45
RJ-45
120-ohm balanced
120-ohm E1
trunk cable
trunk cable
twisted pair cable
connector