Hi ExpertsCan we continue to use the 9900 series IP phones, during a firmware upgarde or is it rendered useless till the time it is upgarding/downgrading its firmware. I have heard we can use these phones(for call) during a firmware upgarde.Am i righ...

I want to configure idle URL for 7965 phones but the problem is i cannot get the image to colored onto the screen(since the phone is a colored phone)...Call manager is 7.1.2 ...I have an external TFTP server for the image  and the XML file to be uplo...