What you've got there is a TTL level USB to UART converter. They are useful for interfacing microcontrollers for example (I currently usually use a converter with 3.3V levels). Apparently the Cisco device uses the actual RS232 standard which originally used higher voltages (like you can see with the working serial converter). Some new(er) devices may work with 5V RS-232 but it can never be guaranteed.
The USB serial device I showed in the video was sold as an RS-232 adaptor - www.ebay.com.au/itm/USB-to-RS232-Serial-Port-9-Pin-DB9-Cable-Serial-COM-Port-Adapter-Convertor-/191376461161?pt=LH_DefaultDomain_15&hash=item2c8eed0d69 I've got a couple of the TTL level UART units that I use for mucking around with PIC32s and mmbasic. I've also tested some other units, including a Belkin on the Cisco 3600 series APs with the same results. I'm pretty sure that it's more a case of the Cisco 3600s being picky. Thanks for watching!
I love me some excessive troubleshooting. I suspect that ACchannel is correct, the usb controller is actually a chipset for UART using rs232 , which is handy for getting to the hidden console of linux embedded devices, and as they work on most ciscos, got sold as an RS232 adapter. I can only imagine that you messed around with a boatload of pinouts and bitrates first, so rather annoying.
What you've got there is a TTL level USB to UART converter. They are useful for interfacing microcontrollers for example (I currently usually use a converter with 3.3V levels). Apparently the Cisco device uses the actual RS232 standard which originally used higher voltages (like you can see with the working serial converter). Some new(er) devices may work with 5V RS-232 but it can never be guaranteed.
The USB serial device I showed in the video was sold as an RS-232 adaptor - www.ebay.com.au/itm/USB-to-RS232-Serial-Port-9-Pin-DB9-Cable-Serial-COM-Port-Adapter-Convertor-/191376461161?pt=LH_DefaultDomain_15&hash=item2c8eed0d69
I've got a couple of the TTL level UART units that I use for mucking around with PIC32s and mmbasic.
I've also tested some other units, including a Belkin on the Cisco 3600 series APs with the same results. I'm pretty sure that it's more a case of the Cisco 3600s being picky.
Thanks for watching!
I love me some excessive troubleshooting. I suspect that ACchannel is correct, the usb controller is actually a chipset for UART using rs232 , which is handy for getting to the hidden console of linux embedded devices, and as they work on most ciscos, got sold as an RS232 adapter. I can only imagine that you messed around with a boatload of pinouts and bitrates first, so rather annoying.
Could be the polarity.
Stewart McEwen Yes, perhaps a Peter Brock style "Blue Energy Polariser" would fix it.