I spent way too much time doing this, but I formatted Callcentric's Logo for Cisco 7940 series phone.
 
It is at:  http://linuxslate.com/files/callcentric.bmp
 
Please DO NOT point your phone at this URL.  Download it, put it on a server inside your network, and point your phone there. I cannot guarantee that the logo will remain at that URL.
 
Instructions on how to make this logo appear on your phone are here:
 
http://www.jtech.net/ip_phone/cisco/79xxlogo.aspx
 
They also have a couple other logos for Cisco IP phones, and were a huge help to me in un-bricking and setting up a 7940 that I purchased.
 
I of course, do not own the Callcentric trademark. I claim no ownership of the logo.  My work in technically making their artwork work on certain phones is a gift to Callcentric and to other satisfied Callcentric customers.