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CTL Inc.
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CT-based, manufacturer of VOIP-based voice-messaging systems utilizing Session Initiation Protocol (SIP) and Host Media Processing (HMP).
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Asterisk
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An open source telephony switching and private branch exchange service. Allows peer-peer calling using a variety of voice over internet protocols.
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Onramp Access
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Provides business oriented VoIP services across fully managed T1 connections.
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