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Cisco 7940 - Protocol Application Invalid at boot.

Discussion in '3CX Phone System - General' started by andykeen, Nov 16, 2010.

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  1. andykeen

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    Hi All.

    As part of our ongoing learning curve!!!! - we have purchased a Cisco 7940 IP phone (Ebay - 2nd Hand).

    When we connect it to our switch (Part of an SBS2003 Domain) and power it on - the LCD comes up with - 'configuring VLAN' - 'Configuring IP' and then it stays on 'Protocol Application Invalid'.

    I have reset the phone to no avail....

    I have done a little research and have setup the DHCP Set Define Option 150 and we have installed TFTP on the server - but from here were lost....

    Does anyone know whats going on and what can help.

    Thank you
    Andy Keen
     
  2. Wanderer

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    Hi Andy
    Are these phones running SIP firmware ? if so what version ?

    Tim
     
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