CISCO ASR 920 Series Router Console Port Connection

Moduletek Limited Laboratory in the use of CISCO ASR-920-24SZ-M router observed that the device's Console port is different from other CISCO devices, the physical shape of the interface for the USB-A, the next take you to learn to understand the device Console port how to connect.

We tried to use the standard USB to DB9 serial cable, can not be connected; also according to the installation manual on the way to use the USB to RJ45 cable in the middle of the RJ45 adapter, converted to DB9 access to the host, still can not be connected. From the installation manual, the physical shape of the USB-A console interface is actually not USB, but TIA/EIA-232F standard.

Figure 1 Interface Rate Configuration Error Message

We found a sharing about CISCO ASR 920 series router console interface in Cisco community, according to their sharing the cable pinout order is as follows;

Figure 2 Cable Pin Arrangement

Next we make a usable Console cable by ourselves according to the above cable order; prepare an ordinary USB cable, cut off one end of the connector, here I use a Micro USB cable, cut off the Micro_USB connector, peel off the outer skin, you can see that there are four copper wires, the color of which are red, white, green and black;

Figure 3 USB cable cut off one end

The copper wires will be arranged in accordance with the above line sequence, and access to the corresponding position of the RJ45 crystal head, the use of crimping pliers to press, and hear the “click” sound indicates that the pressure is in place.

Figure 4 Access to the RJ45 crystal head

Cable production is completed after the use of RJ45 to DB9 female adapter, connected to the router through the serial port, you can also use the RJ45 adapter to the standard DB9 serial line;