thieuhofkes
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Member since ‎12-05-2016
‎08-18-2017

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Hi all I bought a 2nd hand Cisco 7940 to use as SIP phone. When powering up, the error "Protocol Application Invalid" appears. I have no clue what to do. I work on Apple OS. Anyone here who can help me out? Many thanks thieu
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Member Since ‎12-05-2016 09:29 AM
Date Last Visited ‎08-18-2017 03:53 AM
Posts 1