ISDN (Integrated Services Digital Network) is a proven, reliable technology, the perfect digital solution when your customer wants to move from on from a simple phone line but is perhaps not quite ready for a full IP based system.
Also known as Telstra ISDN2, ISDN10/20/30 or Optus Multiline it provides simultaneous calls on the same phone number. Every staff member can also be given their own direct phone number allowing multiple inbound and outbound calls.
Integrated Services Digital Network
The proven digital solution allowing for multiple phone lines.
BTB recommend your customers transition to the more advanced SIP based solutions, however, in certain circumstances an ISDN product may be more suitable.