This guide shows programmers and administrators how to implement, program and administer VOIP systems using open source tools instead of more expensive options.
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This guide shows programmers and administrators how to implement, program and administer VOIP systems using open source tools instead of more expensive options.
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Add this copy of Practical Voip Using Vocal: Mgcp, H.323, Sip, Rtp, Cops to cart. $40.46, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Santa Clarita, CA, UNITED STATES, published 2002 by O'Reilly Media.
