I have a CallManager and a GSM Box with one SIM inside.
The GSM Box is attached to the VoiceGW by a FXO card.
The SIM has 900 free minutes/month, after which GSM calls are "expensive".
I' like to block routing of GSM calls to the GSM Box if the timer of 900 minutes is reached.
Unfortunately, the GSM Box is "stupid" (it isn't configurable).
Is there a way to do that directly on the CallManager configuration?
Thanks in advance for your help!