Embedded VOIP SIP Developers Kit 

Embedded Windows CE VOIP Developers Kit is your embedded telephony solution for developing software/hardware to enable device to device phone calls using SIP/H323 phone right at the electronics level.
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VoiSpeed Server 

VoiSpeed is a software solution that lets you build complete telephone networks over LANs and realize Internet telephony, CRM and Call Center applications, integrating itself with databases and managerial softwares.
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