Cisco ASR 903, Installation Manual, Page: 171 / 200

C H A P T E R
5
Troubleshooting
This chapter provides information for troubleshooting problems on the Cisco ASR 903 Router.
• BITS Port Pinout, on page 161
• GPS Port Pinout, on page 162
• Time of Day Port Pinout, on page 163
• Alarm Port Pinout, on page 164
• Console/Aux RJ45 RS232 Serial Port Pinout, on page 164
• T1/E1 Port Pinout, on page 171
• Serial Cable Pinouts, on page 172
• E and M Interface Module Pinouts, on page 174
• Management Ethernet Port Pinout, on page 174
• USB Console Port Pinout, on page 175
• USB Flash/MEM Port Pinout, on page 176
• Fiber-Optic Specifications, on page 176
• LED Summary, on page 177
BITS Port Pinout
The table below summarizes the BITS port pinout of the Front Panel “Building Integrated Timing Supply”
RJ48 port.
Table 25: BITS Port Pinout
Description Direction Signal
Name Pin
Receive
Ring Input RX Ring 1
Receive Tip Input RX Tip 2
Not used — — 3
TX Ring Output TX Ring 4
TX Tip Output TX Tip 5
Cisco ASR 903 and ASR 903U Aggregation Services Router Hardware Installation Guide
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