Latest DAHDI Release Includes Support for Xorcom's TwinStar

DAHDI Linux 2.2.0 and DAHDI Tools 2.2.0 support award-winning TwinStar™ redundancy and explicit ordering of Astribank™ channel banks for multi-unit setups

Xorcom, a privately-held manufacturer of business telephony interfaces and appliances based on Asterisk® open-source software, reported today that the new DAHDI Linux 2.2.0 and DAHDI Tools 2.2.0 release includes support for Xorcom's TwinStar, a full redundancy solution for complete Asterisk-based PBX systems. An an active member of the Asterisk developer community, Xorcom developed several new features and committed them as open source to the new DAHDI version. In addition to various bug fixes, the new DAHDI releases also support explicit ordering of Xorcom’s Astribank channel banks in cases of multiple Astribank setups and native support for Astribank BRI modules. Both releases are available for immediate download at http://downloads.asterisk.org/pub/telephony.

List of Enhancements Included in DAHDI 2.2.0 Releases

As per the Asterisk Development Team announcement, in addition to various bug fixes, the new releases include:

• Support for new Xorcom Astribanks with the TwinStar option.
• Improved hardware echo canceler performance for Digium VPMADT032.
• Improved fax tone detection and echo canceler / fax handling.
• Improved timing accuracy of dahdi_dummy, including when running in virtual environments.
• New buffering policy (DAHDI_POLICY_HALF_FULL) which can help faxing performance.
• Fixes for Dahdi-perl for non-Xorcom hardware.
• BRI Astribank modules no longer need the bri_dchan patch.
• Explicit ordering of Astribanks for multi-Astribanks setups.

TwinStar - High Availability Solution for Complete Asterisk-based Systems

TwinStar provides automatic detection of server failure and immediate switching of all telephony functions, including telephony interfaces, to a back-up server. This quick and automatic failover process keeps downtime to an absolute minimum. The TwinStar solution is comprised of two identically-configured Xorcom Asterisk servers and an Xorcom Astribank 2 channel bank with dual USB ports. It features:

1. Full dual-server redundancy for complete Asterisk PBX systems, including telephony interfaces
2. Automatic detection of server failure and switching to backup server, within seconds
3. Firmware-based switching mechanism that is not network-dependent

High Density, Multi-Type Telephony Expansion in a Compact Unit

The Astribank channel bank is interoperable with all current Asterisk PBX systems, due to the fact that the Astribank driver has been included as an official part of Zaptel (now DAHDI) since release 1.2.4. Astribank provides businesses a tremendous opportunity for expansion at a fraction of the traditional cost of telephony equipment, since a single Astribank channel bank supports up to 32 analog ports, up to 8 BRI ports, and up to 144 PRI + FXS/FXO analog ports in a 19" 1U chassis (144 = quad E1 + 24 analog ports). Multiple Astribank units may be connected to a single Asterisk server using different USB 2.0 ports, a USB 2.0 hub or USB 2.0 PCI card. For a complete listing of all current Astribank models go to http://www.xorcom.com/telephony-interfaces/astribank-models.html.