Digital Telephony Cards

TE820 Digital Cards

Sangoma’s TE820 Octal-Span digital card is built exclusively for high-density Asterisk® applications that require high-performance, cost effective digital connectivity. The TE820 includes eight independently software-selectable digital telephony interfaces, supporting up to 192 channels (in T1/J1 mode) or 240 channels (in E1 mode) — the highest single-card port density available for use with Asterisk. The TE820 seamlessly interconnects traditional telephony systems with Voice over IP (VoIP) technologies at the lowest per-port price on the market today.

The TE820 octal span digital card supports industry standard telephony protocols, including multiple variants of Primary Rate ISDN. Each span can be configured as either CPE or network for optimal flexibility. The optional VPMOCT256 hardware echo cancellation module, based on the industry-leading Octasic™ chipset, offloads the task of echo cancellation from the CPU, increasing overall system performance and call quality.

Digital Card Applications


Use inside a server of your choice, powered by Linux/Windows, to create a SIP-TDM Gateway to allow IP-PBX to route calls to traditional PSTN.


Use inside a server of your choice, powered by Linux/Windows, to create a SIP-TDM Gateway with your  legacy analog based PBXs to replace expensive analog line connections with SIP trunking to allow reduced call costs, reduced line rental, and bring extra flexibility and disaster recovery.

Call Tapping

Monitor and record telephone conversations for lawful call interception.

High Density IVR

Combine Sangoma octal port cards to achieve high density calling to create large scale IVR solutions.

Digital Card Features

high density

8 T1 / E1 Spans for up to 240 concurrent calls per card.

protocol support
Protocol support includes: ISDN PRI, Robbed-Bit, CAS.
hardware echo cancellation
Optional hardware echo cancellation module.
Learn More

For more features, view the Data Sheet.

Digital Card Specifications

Digital Card Specifications

  • Interfaces: 8 x RJ45 connector for up to 192 T1, 240 E1 voice channels.


  • 2U form factor
  • 157mm x 106mm for use in restricted chassis

PCI Interface

  • PCI Express
  • X1 PCI express

DSP Echo Canceller (optional)

  • G.168-2002 echo cancellation in the hardware
  • 1024 taps/128 ms tail per channel on all channel densities
  • DTMF decoding and tone recognition
  • Voice quality enhancement: music protection, acoustic echo control and adaptive noise reduction
  • No CPU load as a result of echo cancellation
  • Does not increase the physical size of the card, and no additional slot is required


  • 1TE820F - Eight (8) span digital T1/E1/J1/PRI PCI-Express x1 Card
  • 1TE820BF - Eight (8) span digital T1/E1/J1/PRI PCI-Express x1 Card and HW Echo Can

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