You know you have logged into a lot of Cisco routers when you wear out the RJ-45 connector on the end of your favorite console cable.Ĭisco has now given us the ability to connect our laptops to the USB ports for console access. Note that the end on the light-blue console cable has been replaced and a yellow boot added because of excessive wear. I realize that this is expensive but it is the most reliable and its driver seems universally accepted by laptop operating systems.
I use a Keyspan USA-19HS USB to serial adapter. Here is a picture of one of my typical USB cables. Because I often connect to multiple devices at the same time, such as redundant supervisors on 6500s or to two supervisors in redundant 6500s or VSS, I need two serial cables. For years I have hauled around two console cable sets. I also hope that Cisco will enable all of the USB Type-A ports on their other devices for similar connectivity. I am hoping that this new method continues to be spread to other devices.
Wouldn't it be cool if you could connect the myriad of USB devices to a Cisco router to further the list of amazing things you could do? Cisco has started to put mini-USB ports on their devices to allow for console port connectivity.
I have been hoping for all kinds of USB functionality to routers, switches, firewalls but Cisco has been slow to unlock the power of these USB ports. you just need to not think about 568a/b cable standards here and what does it take to connect and switch handshaking and data flow for RS232.For years I have been wondering when Cisco would activate the USB ports on their devices. pin 7 never got to pin 1 in a network cable. The author also put the correct null modem swaps of hand shacking into the cable on the re build. I build these cables daily you just need to record and know that the jack has to match the end you cut off.
Looking at the crimp end with the gold pins facing you record the colors and what pin that color goes to should follow the above chart then you need to match that position to the correct position on the CAT5 jack using a 568B configuration as the chart shows above. To actually color code this to a jack would assume that CISCO uses the same colors all the time. Every Jack uses the 568a/b standard the author chose the 568B pin out to use. Do not mind the color in the cable the position of the color is the important part. Simple you read the chart the way the cable was crimped.
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