Prepaid and postpaid calling card services represent one of the fastest-growing types of enhanced voice services. A variety of consumer segments - students, business and leisure travelers, expatriates, immigrants - have fueled their growth. These services are especially popular among mobile phone users, as an alternative to mobile operators’ outrageously high international rates and roaming fees.

Calling Card System Components:

• Calling Card Module
• Soft phone/IP Phone
• Web Server
• Database Server
• Application Server
• Billing Software Installation

Calling Card Supported Codecs:

• ULAW
• ALAW
• G723
• G726
• G729
• GSM
• ILBC
• SPEEX



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