Digium – 4 port PRI Echo

Digium – 4 port PRI Echo

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Quick Overview

Digium 4 PORT Digital PRI Cards

Quad Span – Echo cancellation

Digium's quad span digital interface cards support 96 (T1 / J1) or 120 (E1) connections to PSTN trunks over four spans (digital circuits). Built exclusively for use with Asterisk and Asterisk-based communications systems, the quad span digital cards provide the best value in digital connectivity.

Quad span digital cards are available in PCI and PCI-Express form factor. All quad span models be combined with Digium's VPMOCT128 echo cancellation module to provide echo cancellation across all channels. Digium cards are compatible with all versions of Asterisk using the DAHDi driver framework.

Product Description

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  • Applications

    • Connect four T1 or E1 trunks to an Asterisk based PBX system
    • Add direct digital PSTN connectivity to Asterisk applications and solutions
    • Ideal for call center applications, service bureaus and large phone systems


    • Up to 24 (T1/J1) or 30 (E1) simultaneous calls per span (96 total T1/J1 and 120 total E1 per card)
    • Supports T1, E1 and J1 physical interface connections
    • Protocol support includes: ISDN PRI, Robbed-Bit, CAS
    • Industry standard RJ-45 port
    • Available in PCI and PCI Express form factors
    • 4 ports
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