My company is developing a voicemail alert application that will allow schools to send voicemails out to parent in the event of an emergency. Most of the other large mobile carriers (Tmobile, Verizon, Sprint, etc..) use a global voicemail number that gives their users the ability to dial in and leave a voicemail message by entering a subscribers phone number and then going through a basic IVR to leave a message. We have found that AT&T uses not a single global voicemail number but many regional voicemail numbers to access their IVR for leaving a voicemail. My questions...
1. How could I utilize free switch to successfully deliver voicemails to AT&T subscribers. 2. Would any of these functions for delivering voicemails be available through using AT&T's API?
Any help would be appreciated.
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