ATM support has been part of the Linux kernel since kernel Version 2.4 and requires no additional patches; however, configuring of the kernel requires the entry "Promptfor development and/or incomplete driver" to be activated to provide selection of the desired ATM support.
The signaling daemon described above is not part of the Linux kernel; it has to be installed additionally in the user space. It can be downloaded from [BlAl01], where you will also find other utilities that complete the ATM support in Linux. The current development of the ATM support for Linux can be followed up from the mailing list available at [BlAl01].