Cisco IP phone7940

[jayul2010]

Hello,

I tried to upgrade my Cisco IP phone7940 from SCCP to SIP. After files uploads, the phone display "Protocol Application Invalid" in the LCD Screen.

The menu button is not enable.

What is my problem, can you help me.
Best regards

[Rasika Nayanajith]

This is not the right place for this thread (move it to collaboration section).

Anyway see if this helps on this

http://www.tutorials.makkugasho.com/2014/02/14/convert-79407940-cisco-ip-phone-from-sccp-to-sip/

HTH

Rasika

[jayul2010]

Ok thanks

[gohussai]

Simple 4 step process. Please check

http://www.3cx.com/blog/docs/cisco-7940-sip/

[mohanak]

This document describes one reason that Cisco IP Phone models 7940 and 7960 fail to boot with the error message Protocol Application Invalid. This message displays in the liquid crystal display (LCD).

http://www.cisco.com/c/en/us/support/docs/voice-unified-communications/unified-communications-manager-callmanager/67942-phone-boot-fail.html