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VoiSmart v4BRI ISDN board is a PCI bus ISDN adapter, based on Cologne Chip chipset, with 4 basic rate ports. Each port can be configured, separately, as a terminal (TE) or network (NT) port, it can be optionally given a 120 Ohm termination and can optionally supply power to the bus.
VoiSmart vISDN is fully supported by vISDN (http://www.visdn.org/), the multiservice ISDN architecture sponsored by Espia, owner of VoiSmart registered trademark, which allows the full exploitation of the board possibilities and features.
ISDN is 100% Asterisk compatible.
ISDN protocol implementation has been certified by Telecom Italia Labs, according to TBR3 requirements and the strict compatibility constraints of Italian Public Network, as required by Telecom Italia.
VoiSmart vISDN ISDN board has also two connectors for an external PCM bus to link other vISDN boards or E1 boards, or a hardware DSP, soon available by VoiSmart.