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International Systems Research maintains a position at the forefront of VoIP (Voice over Internet Protocol) technology by developing applications and deploying custom solutions such as VoIP-GPS dispatch systems PPPush®-powered flat-rate mobile IP Telephony.
Our products are designed to support a broad array of devices and platforms, and are especially suited for environments requiring mobility. Our PPPhone SIP user agent is available as an OEM product for service providers. PPPhone SIP Stack is currently being utilized in multiple hardware products.
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