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IVR Technologies and Grandstream Networks Complete SIP Interoperability Testing for Prepaid Calling Card Services and Real-Time Billing.

Apr 28
2003

IVR Technologies and Grandstream Networks Complete SIP Interoperability Testing for Prepaid Calling Card Services and Real-Time Billing

IVR Technologies and Grandstream Networks Complete SIP Interoperability Testing for Prepaid Calling Card Services and Real-Time Billing.

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