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The snom100 is one of the first in a family of IP-telephones from snom technology AG. Sound in and out is done with a TP3070 PCM CODEC/Filter. The CPU MPC855T is running at 50Mhz of speed. There is some sort of rs232 connector on the board. That may be used for serial console.
The snom100 is running a modified linux 2.4 kernel. For keyboard, display and sound drivers are done by snom technology. You may take a look into the output of dmesg on this box.
As this thing runs Linux, I was searching for the ramdisk.image that is included in the flash ram. Bad luck that I haven't had access to the flashram chip itself. But snom technology released an flash update on their webserver so I could sniff directly in this file and voila found a regular ramdisk.image at the end. This is normal ext2, so you can loopback mount this thing on a normal Linux system. I liked the idea to login to this phone. When looking at the ramdisk I found lots of places for space improvement. You may have a look at the orginal ls-lRa of the ramdisk.image. Telephon work is done with the two processes lid and LCServer.These are staticaly linked binaries, so they work with other library versions, too.
In other projects I was working with busybox for small linux environments. I compiled this thing with my powerpc computer and got the ideal basis for a new ramdisk. Take a look at what fits on this new ramdisk.