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BIG 5530

ISDN VoIP gateway

with 4 ISDN S0 ports




The BIG 5530 ISDN VoIP gateway links ISDN equipment, e.g. ISDN PBX, to the IP world offering cost-effective communication with a superior quality of service. 4 ISDN S0 ports are available to connect ISDN voice and data equipment to the IP network. With up to 8 simultaneous connections the BIG 5530 provides a powerful solution for small businesses and call centres. By cascading two BIG 5530 gateways the number of ISDN S0 ports and VoIP channels can be doubled. The BIG 5530 supports legacy services, managed IP services and IP Centrex applications.

  • 4 ISDN S0 ports
  • Up to 8 ISDN access sockets
  • Up to 8 simultaneous conncetions
  • Point-to-Multipoint mode for ISDN phones
  • Point-to-Point mode for ISDN PBX systems
  • T3/T4 clocking port for synchronisation of cascaded BIG 5530
  • Support of legacy and managed IP services
  • Support of IP Centrex applications
  • Gigabit Ethernet WAN port
  • 3 Gigabit Ethernet LAN ports
  • Management: CLI via Telnet/SSH, SNMPv3, TR-069
  • Signalling: SIP, SIP Trunking
  • Audio codecs: G.711, G.726, G.729, G722 etc.
  • Fax over IP (T.38, G.711)


Basic voice communications with simultaneous connections, including data and fax

Migration of ISDN PBX to IP network – maintain existing PBX infrastructure and dialing habits

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