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3Com Router 5000 and Router 6000 v2.41
Module Guide
Chapter 3
Multifunctional Interface Modules (Router 5000)
3-46
Note:
AIS = Alarm indication signal; LFA = loss of frame alignment; RAI = Remote alarm indication
3.10.4 Interface Cable
Interface cables (T1 cables) for modules are 100-ohm straight-through shielding
network cables, as shown in the following figure:
Figure 3-51 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.
Caution:
Both T1 cable and network interface connector are optional accessories. You should order them
together with the module. Otherwise, they will not be provided.
3.10.5 Connecting the Interface Cable
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 Router 2-Port CT1/PRI MIM. 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.