The figure below shows how the cable is connected between the T1/E1 interface module and the patch panel.
Figure 59: Cable Installation Between T1/E1 Interface and Patch Panel
Interface
Label
Patch panel interfaces
1
For information about the pinout of the cable connecting the T1/E1 interface to the rear of the patch panel,
see the
.
RJ45 Cable Pinouts
T1 lines from individual subscribers are attached to RJ45 connectors on the front of the 24-port patch panel.
Each RJ45 port accommodates an individual T1 subscriber line.
For information about the T1/E1 ports, see the
section.
Connecting Cables to the Patch Panel
If you are connecting two T1/E1 interfaces to each other, you must cable both interfaces
’
patch panels together
using a T1 crossover cable or a T1 straight-through cable. Use shielded cables. The type of cable you use
(crossover or straight-through) depends on how the T1/E1 interfaces are cabled to their patch panels:
•
If both the T1/E1 interfaces are connected to their patch panels in the same manner (TX to Transmit and
RX to Receive, or TX to Receive and RX to Transmit), use a T1 crossover cable to connect the patch
panels.
•
If both the T1/E1 interfaces are connected to their patch panels in a different configuration (TX to
Transmit and RX to Receive on one interface, and TX to Receive and RX to Transmit on the other
interface), use a T1 straight-through cable (standard RJ45 patch cable) to connect the patch panels.
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
108
Installing the Cisco ASR 902 Router
Connecting T1/E1 Cables