Prepaid Calling Card Service includes the following features:

1. Multiple Service provider support with customizable access numbers, prompts and languages.
2. All IVR pages can be customized to add home menu, post PIN and post destination number dial prompts e.g.:
   1. Calling Card Balance at the beginning of the call.
   2. Maximum Call duration based on destination dialed
   3. Recharge by PIN
3. Subscribers can initiate a new call at the end of the first call by pressing a # key.
4. Multiple callers using the same PIN cannot call simultaneously in order to prevent misuse.
5. Service Providers can introduce call restrictions based on parameters chosen like dialed number.
6. Service Providers can introduce charge for using the IVR prompts alone if the subscriber does not complete a billable call.
7. Service providers can enable Prepaid Calling in 2 different forms:
   1. PIN based: Using these cards, the subscriber can call from any of the phones associated with the Service Provider into an IVR and then get authenticated using his/her password. In this case, the phone does not get billed; the charges are passed on to the PIN.
   2. PIN Less: PINs can be associated with a specific telephone number. When a subscriber makes a call, the system captures the CLI, authorizes it and prompts the subscriber to dial the destination number.

In a callback facility, the subscriber informs the system of the origination and termination numbers through a web interface or by calling into a Callback Prompt followed by the destination number where the origination number CLI is noted. The system then initiates a call to the destination and the origination numbers and connects both of them. The following are the ways through which the subscribers can initiate a Callback:

1. Using a Phone:
   1. Through a PIN: The subscriber calls the system. The System notes the CLI and calls back the caller, prompts for the authentication PIN. Upon authentication of a valid subscriber, the system prompts the caller for the destination number and connects the Caller and Callee.
   2. Through ANI: The subscriber calls the system. The System notes the CLI, authorizes it and calls back with a prompt for the destination number. Upon dialing the destination number, the system connects the Caller and the Callee. Subscribers can add multiple ANI Numbers to their account,
   3. Through DID Number: In case the Caller ID is blocked, the subscribers can call a DID number associated with their account. The system calls back a predefined number associated with the DID number and prompts the caller for the destination number. Upon dialing the destination number, the system connects the Caller and the Callee.
2. Using Web:
   1. The subscriber comes to the Service Provider website and gets authenticated through his/her User Id / password. The subscriber then provides the destination number on the same webpage. The system calls both Caller and Callee and connects both of them.
   2. This Facility can also be used for providing Click-2-Talk service to Enterprise customers. While browsing, a potential customer can click on a TALK button on a website to initiate a call to Sales / Support representative of an enterprise. The system collects the customer’s phone number and initiates a call-back to this and the enterprise number.
   3. Subscribers can schedule the Call Back using the web based interface.