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Green PCIe card with four network ports and daughterboard

Digium

Digium 1TE435BF 4-Span T1/E1/J1 PRI PCIe x1 Card

SKU CH-8KK0-RPFR7 MPN 1TE435BF

Four-span T1/E1/J1 PRI PCIe card with 128-channel hardware echo cancellation supporting 96 T1 or 120 E1 simultaneous calls

  • Hardware echo cancellation with 128 channels for clearer calls
  • Four spans deliver up to 96 simultaneous T1 calls
  • Four spans deliver up to 120 simultaneous E1 calls
  • PCI Express x1 interface fits low-profile servers
  • Optimised for Asterisk-based telephony systems

Four-Span Digital Voice Interface

The Digium 1TE435BF is a new PCI Express x1 card that delivers four independent T1/E1/J1/PRI spans for Asterisk-based telephony systems. Onboard hardware echo cancellation handles up to 128 channels to maintain clear audio across every call.

Suits Asterisk Deployments Needing Dense Trunking

This card targets integrators building PBX or contact-centre platforms that require up to 96 simultaneous T1 calls or 120 simultaneous E1 calls from a single slot. Sites that only need analogue FXS/FXO connectivity or SIP trunking without TDM interfaces should consider other interface types.

Hardware Echo Cancellation Across 128 Channels

The integrated VPM128 module offloads echo cancellation from the host CPU, supporting the full 128-channel capacity across all four spans. Verifying that your Asterisk build includes the DAHDI driver for this hardware is the step that confirms the card will operate as intended.

Highlights

  • Hardware echo cancellation with 128 channels for clearer calls
  • Four spans deliver up to 96 simultaneous T1 calls
  • Four spans deliver up to 120 simultaneous E1 calls
  • PCI Express x1 interface fits low-profile servers
  • Optimised for Asterisk-based telephony systems

Specifications

No published specifications for this item yet.

Questions about this item

Does the VPM128 echo-cancellation module add noticeable heat or power draw during all-day operation?

The on-board VPM128 handles echo cancellation in hardware, so the card runs without a fan and adds minimal thermal load to the server chassis.

Which Asterisk-compatible drivers and DAHDI kernel modules must already be installed for the four T1/E1/J1 spans to be recognised?

The card requires standard DAHDI drivers and the wcte43x module included in current Asterisk distributions; no proprietary binary blobs are needed.

Will the PCIe x1 interface limit call capacity when the card sits beside older PCI-X Digium cards in the same chassis?

Each span delivers up to 96 simultaneous calls on T1 or 120 on E1, and the x1 link provides ample bandwidth for all four spans without throttling legacy cards.

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