VoIP Cards

The Digium VPM128 is compatible with the TE435 T1 PCI Express card. This module eliminates voice echo commonly associated with PSTN's. Echo cancellation software can reduce the echo, but is not always effective. The VPM128 echo cancellation module...

The Digium VPM064 echo cancellation module is compatible with A8-series analog cards and the TE235 T1 card. This card solves the voice echo problem commonly associated with connecting a PCI card to a PSTN. While software-based solutions are available,...

The Digium VPM032 echo cancellation module is compatible with A4-series analog cards. When Asterisk is connected to a PSTN, voice echo is possible. While software-based solutions are available, they aren't always effective. This echo cancellation unit...

The Digium TE820F features four ports, providing eight spans of digital telephony interface. Install the card on an available PCI Express slot. The eight spans can be independently selected and configured, allowing you to fully leverage your existing...

The Digium TE820BF PCI Express card provides echo cancellation and full support for Asterisk applications. This card supports up to 192 simultaneous calls from connected T1 telephony devices. Individually select the eight spans on the four ports through...

The Digium 1TE436BF card features the VPM128 echo cancellation module. The module brings hardware-based echo cancellation to the card for enhancing overall audio quality in voice communications. This card also features four T1 ports, a PCI interface and...

Digium TE435F features a total of four interfaces. Through PSTN trunking, these interfaces can provide up to 96 simultaneous calls via T1 or 120 simultaneous calls via E1. The Digium TE435F digital PCI Express is designed exclusively for use with...

Digium TE435F is designed to provide optimal voice quality for Asterisk-based systems. This digital PCI Express card features echo cancellation to improve audio quality. The four interfaces can support up to 96 simultaneous calls through T1, or 120...

The Digium 1TE236BF card features the VPM064 echo cancellation module. The module provides hardware-based echo cancellation for enhancing audio quality and voice communications. This card also features two T1 ports, a PCI interface and a half length, low...

Digium TE235F features two interfaces for providing voice connectivity. This PCI Express card can support up to 48 simultaneous calls via T1 or J1, or 60 simultaneous calls through E1. The Digium TE235F digital PCI Express card utilizes PSTN trunks over...

Digium TE235BF features an echo cancellation module to provide carrier-grade audio for voice communications. This digital PCI Express card can support 48 concurrent calls via T1, or 60 concurrent calls via E1, through the dual interface ports. This card...

The Digium TE134F PCI card supports T1, E1 and PRI environments. Use the Digium TE134F to leverage an existing analog system with VoIP, featuring a single RJ48 port. Onboard echo cancellation enhances voice and audio performance, and also saves this task...