The SIM server has knowledge of available SIMs in the various SIM arrays.
The SIM card to use is selected based on a set of advanced criteria such as current date and time, price plan, GSM provider.
Once selected, it provides the gateway with useful information to access this SIM card. The gateway directly contacts the SIM array through TCP/IP to read the SIM information and register it on the GSM network.
Periodically, the SIM Server checks GSM port status and then detects when a SIM card needs to be changed.
Criteria to change SIMs are a combination of time, date, price plan limit, SIM validity.
When one of this criteria matches, the SIM Server will associate another SIM to the gateway.
When prepaid cards or monthly plans are running short of credit, SIM cards are automatically removed from routing.
A new SIM card is then immediately allocated improving drastically your ASR (Answer Seizure Ratio) and taking full advantage of your GSM gateways. |