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94 CHAPTER 3: MULTIFUNCTIONAL INTERFACE MODULES
Figure 106 T1 cable
In addition, you may use a network interface connector to extend a T1 cable. Both
ends of the connector are RJ-45 jacks that can connect two network cables.
c
CAUTION: Both T1 cable and network interface connector are optional
accessories. Please order them together with the MIM-1T1/MIM-1T1/MIM-4T1 or
MIM-1T1-F/MIM-2T1-F/MIM-4T1-F module. By default, they are not provided.
For the cable pinouts, see Low-End and Mid-Range Series Routers Cable Manual.
Connecting the Interface
Cable
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CAUTION:
■ 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 interface modules
and even the Router;
■ Some protection measures are taken for MIM-1T1/MIM-2T1/MIM-4T1 module.
Still, you are recommended to install a special lightning arrester at the input
end of the cable leading to the outdoors in order to protect the line against
lightning strikes more efficiently.
Step 1: Insert one end of a T1 cable into the RJ-45 connector on the T1 or T1-F
module;
Step 2: Connect the other end of the cable to the device to be connected:
■ directly if the cable is long enough; or
■ after extending the cable if it is not long enough, as shown in the following
figure:
Figure 107 Extending a T1 cable
Step 3: Check the behavior of the LINK LED on the MIM-T1 or MIM-T1-F panel. It
is OFF when the line is faulty and signal is out of synchronization. In this case,
check the link.
Router
DDN, etc
RJ45
Network interface connector
RJ45
Straight-through network cable
RJ45
shielding network cable)
T1 cable (100-ohm straight-through