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CHAPTER
5-1
Cisco ASR 903 Router Hardware Installation Guide
OL-25178-04
5
Troubleshooting
The following sections provide information for troubleshooting problems on the Cisco ASR 903 Router.
• Pinouts, page 5-1
• LED Summary, page 5-7
Pinouts
The following sections describe the pinouts for the Cisco ASR 903 Router interfaces:
• BITS Port Pinout, page 5-1
• GPS Port Pinout, page 5-2
• Time of Day Port Pinout, page 5-2
• Alarm Port Pinout, page 5-3
• Console/Aux RJ45 RS232 Serial Port Pinout, page 5-3
• T1/E1 Port Pinout, page 5-4
• Management Ethernet Port Pinout, page 5-5
• USB Console Port Pinout, page 5-6
• Fiber-Optic Specifications, page 5-6
BITS Port Pinout
Table 5-1 summarizes the BITS port pinout.
Table 5-1 BITS Port Pinout
Pin Signal Name Direction Description
1 RX Ring Input Receive Ring
2 RX Tip Input Receive Tip
3 Not used
4 TX Ring Output TX Ring
5 TX Tip Output TX Tip