Dear Ivan,
Thank you for reaching Cisco Small Business Support Community.
If you have already tried the reset button, 10 seconds should be enough, and still not able to access the web interface through 192.168.1.1 IP address, I suggest you to contact the Small Business Support Community for further assistance, something definitely went wrong with the firmware upgrade;
https://www.cisco.com/en/US/support/tsd_cisco_small_business_support_center_contacts.html
Please do not hesitate to reach me back if there is any further assistance we may help you with.
Kind regards,
Jeffrey Rodriguez S. .:|:.:|:.
Cisco Customer Support Engineer
*Please rate the Post so other will know when an answer has been found.
Jeffrey Rodriguez S. .:|:.:|:.
Cisco Customer Support Engineer
*Please rate the Post so other will know when an answer has been found.