GSM Callback Function for GSM Gateway

The GSM-Callback function is a feature of the TransNova^® Gateways to realize cost-saving connections from mobile phones to any destination number in fixed or mobile networks.

The functionality :

A mobile phone user wants to set up a connection from his mobile phone to any destination number (Fixed network, mobile network, national or international).
Instead of dialling directly the destination number, the user calls the number of the SIM-Card in the TMG.

Callback 1

The TMG checks the calling user for authorisation etc., without setting up a connection.
The TMG immediately calls back the user, so that depending of available SIM-Card for this part of the connection only a network internal tariff (GSM - GSM) is charged.

Callback 2

The caller takes the call from the TMG and dials afterwards the requested destination number.
The TMG sets up a connection to the destination number via the integrated Least Cost Router.

Callback 3

The advantage:

By using the callback function two connections are charged:

TMG → calling user (network internal connection GSM -- GSM)
TMG → destination number (via Least Cost Router)

These connections together usually represents a cheaper alternative than the direct dialling of the destination number on the mobile phone, especially for calls to fixed network or international calls.

The GSM-Callback feature can be realised with any TransNova Gateway.