3Com 3C13701 Installation Manual page 41

You can also choose to use network connector assembly, for extending two T1 interface
cables.
T1 interface cable and network connector assembly are optional.
Connecting T1 Interface Cable
CAUTION:
Examine the interface mark before connection to avoid cable mis-insertion and router
■
damage.
When the T1 interface cable is routed outdoors, you need use the special lightning
■
protection unit at the input end to prevent possible damage.
1 Insert one end of the T1 interface cable into the E1 interface of the router.
2 Insert the other end to the peer device.
If one cable is enough in length, insert the other end to the peer device.
■
If not, you need to extend the T1 interface cable with a network connector assembly
■
as shown in the following figure:
Figure 35 Extending two T1 interface cables
3 Observe the status of the Link LED for the T1 interface. ON means that a link is present.
OFF means that no link is present and you need to check the line.
Connecting Router to the WAN 41