Rj45 Cable Pinouts; Connecting Cables To The Patch Panel - Cisco ASR 902U Hardware Installation Manual

Connecting T1/E1 Cables
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
Label
1
For information about the pinout of the cable connecting the T1/E1 interface to the rear of the patch panel,
see the T1/E1 Port

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

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
Pinouts.
Interface
Patch panel interfaces
T1/E1 Port Pinouts section.
Installing the Cisco ASR 902 Router