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Cisco ASR 903 Router Hardware Installation Guide
OL-25178-04
Chapter 5 Troubleshooting
Pinouts
USB Console Port Pinout
Table 5-8 summarizes the USB console port pinout.
Note The USB Console port +5VDC is input and operates as an USB peripheral device.
USB Flash/MEM Port Pinout
Table 5-9 summarizes the USB flash/MEM port pinout.
Note USB TYPE-A receptacle used.
Note The USB flash/MEM port +5VDC is output. We provide power for USB flash/MEM, and it
operates as a USB host device.
Fiber-Optic Specifications
The specification for optical fiber transmission defines two types of fiber: single-mode and multimode.
Within the single-mode category, three transmission types are defined: short reach, intermediate reach,
and long reach. Within the multimode category, only short reach is available. For information about
optical SFP modules, see the documentation for the SFP module at
http://www.cisco.com/en/US/partner/products/hw/modules/ps5455/prod_installation_guides_list.html.
Table 5-8 Single USB Console Port
Pin Signal Name Direction Description
A1 Vcc +5VDC (500mA)
A2 D- Data -
A3 D+ Data +
A4 Gnd Ground
Table 5-9 Single USB Flash/MEM Port
Pin Signal Name Direction Description
A1 Vcc +5VDC (500mA)
A2 D- Data -
A3 D+ Data +
A4 Gnd Ground