The OpenVox B400M is a mini PCI‑III BRI card with four S/T interfaces, supporting NT/TE mode, DTMF detection, and compatible with Asterisk‑based systems.
The OpenVox B400M is a mini PCI type III card that provides four integrated BRI S/T interfaces. Each port can be independently set to NT or TE mode, and DTMF detection is available on all B‑channels. The card is RoHS compliant and meets ITU‑T I.430 and TBR 3 certification requirements.
Targeted for high‑performance ISDN PC cards, the B400M is suitable for ISDN PBX, VoIP gateways, LAN routers, low‑cost routers, and test equipment. It works with Linux kernel 2.6.x, requires at least 32 MB RAM and a 200 MHz CPU, and is compatible with Asterisk‑based distributions such as AskoziaPBX, trixbox, and Elastix, as well as VIA, PC Engines, and AMD Geode motherboards.
| Number of interfaces | 4 S/T interfaces |
|---|---|
| Mode configuration | NT/TE mode per port |
| DTMF detection | All B‑channels |
| Minimum RAM | 32 MB |
| Minimum CPU speed | 200 MHz |
| RoHS compliance | Yes |
It provides four integrated BRI S/T interfaces, each of which can be set to NT or TE mode independently.
The card works with AskoziaPBX, trixbox, Elastix and other Asterisk‑based distributions.