Sangoma Digital Telephony Cards transport voice, as well as data, and make voice and data integration easy. Sangoma A500 S/T BRI Interface Card delivers superior audio quality and scalability. Expand from two to twenty-four ports of BRI with optional Telco-grade hardware echo cancellation. A single Asterisk® PCI or Asterisk® PCI Express slot hosts the connection for up to 24 ports and ensures common synchronous clocking for all channels with no signaling issues. The Card is 100% software configurable. Finally, a BRI Card that upholds Sangoma"s high standards of quality in engineering and untiring product support. FeaturesFrom 2 to 24 ports are supported. Mix TE and NT modes, as required. Changing modes requires no jumpers — simply invert the colour-coded module.Support for Asterisk®, FreeSwitchTM, and Yate as well as other Open Source and proprietary PBX, Switch, IVR, and VoIP gateway applications.Single synchronous Asterisk® PCI and Asterisk® PCI Express interface for all 24 BRI interfaces.Six ports per RemoraTM Card.Dimensions: 2U Form factor: 187 mm x 55 mm for use in restricted chassis.Short 2U compatible mounting clips included for installation in 2U rackmount servers and high quality, tested 2 m 8-pin RJ45 port splitter cables included.32 bit bus master DMA data exchanges across Asterisk® PCI interface at 132 Mbytes/sec for minimum host processor intervention.Autosense compatibility with 5 V and 3.3 V Asterisk® PCI busses.Fully Asterisk® PCI 2.2 and Asterisk® PCI Express compliant, compatible with all commercially available motherboards, proper sharing of Asterisk® PCI interrupts. Operating SystemsLinux (all versions, releases and distributions from 1.0 up).