OpenCA - Lite
openCA-Lite is an entry-level media gateway controller for carriers looking to implement a small-scale interconnection between circuit-switched and VoIP networks. It supports industry-standard SS7 and VoIP protocols to enable simple deployment in most networks.

Problems solved
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Reduces infrastructure costs by replacing expensive PRI connections with price-competitive SS7 services
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Enables customers to easily pilot new VoIP services while requiring only minimum upfront expenditure
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Allows SS7 interconnect to be introduced for small-scale points of presence
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Enables circuit-based carriers to easily experiment with IP-based services thanks to the need for only a small capital outlay
Key features
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SS7 single variant support (ETSI, ANSI, ITU or country variants)
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SIGTRAN (M3UA/SCTP) SS7/IP support
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SIP or H.323 support
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Supports up to 480 concurrent calls
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Management via SNMP and CLI
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Optional redundancy through active/standby architecture