The AX4S from Atcom is a 4 port ISDN 2 card supporting a maximum of 8 channels

• 4 Basic Rate Interface ports (I.421) for TE and NT mode
• Hardware DTMF detection
• Conference bridge
• PCM bus connectors daisy chaining of max. 4 cards
• 4 dual-colour LEDs (layer 1 state indicators)
• Active channel switching (across multiple cards over the external PCM bus)
• certified
• Point-to-Point (TE/NT) and Point-to-Multipoint (TE/NT) EuroISDN protocol stack
• Suitable for 3.3 volts and 5.0 volts 32 bit PCI 2.2 slots

Application:

• ISDN BRI PBX
• ISDN least cost router
• Voice over IP BRI gateways
• VoIP integration of ISDN equipment
• PBX to PBX trunking
• IVR