The Asterisk development team is pleased to announce the first offical release of the Digium Asterisk Hardware Device Interface (DAHDI). The list of packages released today includes:

• dahdi-linux 2.0.0
• dahdi-tools 2.0.0
• dahdi-linux-complete 2.0.0+2.0.0

Both dahdi-linux and dahdi-tools are required to enable DAHDI support in your system. You will need to install dahdi-linux first, then dahdi-tools, and finally you can configure and make Asterisk. dahdi-linux-complete is both dahdi-linux and dahdi-tools combined into one download as a convenience. You still need libpri for PRI support with Asterisk if you are using DAHDI.

DAHDI is supported by Asterisk 1.4.22 and Asterisk 1.6.0. More detailed information about each of the packages is below.

dadhi-linux-2.0.0
This is the first release of the DAHDI Linux kernel modules package, which replaces the kernel modules from Zaptel. The primary purpose of this release is to rename the package from Zaptel but in addition to several bug fixes some of the new features are:

• Echo cancelers can now be applied per channel and selected at configuration time.
• Channel memory allocation changed from one large block into smaller blocks in order to reduce out of memory errors on a system that has been running for some time.
• Layout changes to support binary packaging.
• Neon MWI support added to the wctdm24xxp driver.
• Dropped support for Linux Kernel 2.4 as well as the torisa and wcusb drivers.

For information on upgrading from Zaptel to this release, please see: UPGRADE.txt [1]

Known Issues:

• Reference counting is not currently done on echo canceler modules, and therefore it is possible for an administrator to unload an echo canceler module that is in use which could result in a crash. It is recommended to use /etc/init.d/dahdi start|stop to load and unload your drivers to eliminate exposure to this issue. Issue: 13543 [2]

dahdi-tools-2.0.0
This is the first release of the DAHDI userspace tools package, which replaces the userspace components of Zaptel. The primary purpose is to rename components from Zaptel to DAHDI and support binary packaging. The names and layouts of the configuration files have also changed. Please see UPGRADE.txt [3] for more information.

dahdi-linux-complete-2.0.0+2.0.0
This release combines dahdi-linux and dahdi-tools into a single download, one-package installation process. Users who are installing DAHDI for the first time don't have to download and install the dahdi-linux and dahdi-tools packages separately.