ISDN30 consists of 30 channels and is more suitable for medium to large sized businesses which have a PBX and who want voice and data together in their communications system.


Customers can choose to split the use of the 30 channels in any way they wish, perhaps utilising 15 channels for data and 15 channels for voice. ISDN services are also often used as a back-up for offices with a main WAN connection.

What are the benefits?

  • A range of options for ISDN30, which can help you and your business to continue operating normally in the event of disruption.
  • A range of services for ISDN30 which include Direct Dial Inward (DDI), caller display, number withheld, presentation number, selective call barring, by pass number.
  • Up to 30 simultaneous conversations per ISDN30 circuit.