Procotol Application Invalid with SIP image on 7940
All of a sudden a 7940 is getting the message "Protocol Application Invalid" on the LCD. It's impossible to use the keypad, but it is possible to reset the phone to factory defaults by the normal procedure. However that doesn't correct the problem.
I've also tried performing a firmware upgrade. The phone contacts the TFTP server and the file is served. The phone says it's inspecting the load file, then goes back to the "Protocol Application Invalid" message on the LCD.
I found lots of other people having the same problems, without any obvious solutions (as a factory reset doesn't help). Also, I found an article by Cisco regarding the CM software and the dhcp option 150 bug, but this isn't relevant here.
There are cases/situations where we have to configure custome CPTONE to resolve FXO disconnect issue. Following are situations which can arise due to FXO disconnect issue:
Phone A calls Phone B, Phone B does not answer. Phone A then goes on-hook but Phon...
Cisco announced major enhancements today to Webex Contact Center. Learn more about the highlights including
better support for the needs of large contact centers worldwide
improvements in the agent and cust...
SymptomsI’m doing a factory reset on the mobile board and it’s giving me the same issues that I wasn’t able to also send over last time. It says that it can’t connect to the server because of a firewall (we don’t have one) and then sometimes it...