This card supports SS7 signaling and uses a DAHDI patch which is already included in our proprietary driver.
We use the exact same chipsets as the other more expensive brands but since this is the 1st gen board design, it is VERY affordable. A 128 ms hardware based Line Echo Cancellation module can be added to reach the highest standard in voice quality on the market. Build your own open source PBX system while keeping cost at a minimum. Chose from 1-2 or 4 ports with a capacity of 30 channels per port and full duplex data throughput.
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Also works with
Warranty Info

5 Years warranty

Key Features

  • Our PRI cards support SS7 signaling
  • 128 ms Hardware based Line Echo Cancellation on OctassicTM DSP
  • ElastixTM Certified and works with AsteriskTM, FreeswitchTM, YATETM, AskoziaTM, TrixboxTM and more
  • 1, 2 and 4 ISDN-32 PRI T1/E1 ports with 30 B channels and 1 D channel per span
  • EuroISDN (PRI or PRA) - Q.931/Q.921
  • Fully PCI 2.2/PCIe compliant
  • RJ 48 connector
  • Suitable for 3.3 volts and 5.0 volts 32 bit PCI 2.2 slots


  • Use Dahdi versions (patch included)
  • We recommend to use one card per system. If you require more, see our 2nd Gen Card here