OpenVox G400E provides scalable connectivity to GSM networks for your linux machine. It comes with fully GPLed drivers for the linux 2.4.X and 2.6.X kernels. The OpenVox GSM card can be connected to any other OpenVox card to build a real TDM switched PBX.
OpenVox G400E enables full flexibility to traditional telephony systems to go GSM network. It also allows systems integrators to transform highly priced fixed to mobile voice traffic into a much cheaper mobile to mobile call management, with considerable savings.
OpenVox G400E works with Asterisk®, Elastix®, FreeSWITCH™, PBX in a Flash, trixbox®, Yate™ and IPPBX/IVR projects as well as other Open Source and proprietary PBX, Switch, IVR, and VoIP gateway applications.

Operating Systems: Linux (all versions, releases and distributions from 1.0 up)

Certified by trixbox CE and Elastix

Features:

PCI Express 1.0
4 GSM channel
1 SIM card per GSM channel
Quad-Band GSM/GPRS 850/ 900/1800/1900 MHz
Fast call setup
DTMF detection
GSM data connections
GPRS data connections
DIGITAL audio quality (echo cancel)
4 LEDs (network state indicators)
Support external antenna