The DE115E provides an on-board Octasic® DSP-based echo cancellation module. It supports T1, E1, and J1 environments and is selectable on a per-card or per-port basis. The Octasic® DSP-based EC module enables users to eliminate echo tails up to 128ms or 1024 taps across all 32 channels in E1 mode or 24 channels in T1/J1 modes. Further, this module takes advantage of the Octasic® Voice Quality Enhancement to provide superior sound quality on all calls.

The D115E provides a single span PRI/E1/T1/J1 port, which makes it an ideal cost effective option for small to medium sized enterprise applications. OpenVox are a Fonality® Authorized / Certified Ecosystem (FACE) partner and the OpenVox D115E is officially certified for use with Trixbox®.

The OpenVox D115E supports industry standard telephony and data protocols, including both Robbed-bit Signaling (RBS) and Primary Rate ISDN (PRI) protocol families for voice and PPP, Cisco HDLC, and Frame Relay data modes. The board drives both line-side and trunk-side interfaces, including call features. The OpenVox D115E is 100% compatible with Digium® Asterisk and uses the Zaptel/Dahdi opvxd115 device driver.

Standard PC (Personal Computer) hardware can be used along with DE115E cards to provide a low cost migration path from legacy ISDN PBXs towards an Open Source IP PBX based solution. The DE115E is compatible with leading open source IP PBX software such as Asterisk®, Trixbox®, and Elastix® (OpenVox are an Elastix® Strategic partner), which support all the sophisticated features of expensive high-end PBX/Voicemail platforms. Although developed primarily for Open Source IP PBX Asterisk® based applications, the DE115E can be used for any Linux applications/systems that require ISDN connectivity, e.g. Linux ISDN firewalls, VoIP gateways and routers.