Allows users tracking the condition of the other telephone or the subscriber, for example, there will appear a signal on the screen of the telephone device informing that the subscriber is on the line and is temporarily unavailable.
AlphaNet P L
AlphaNet Pty Ltd was formed in 1995 by a group of telecommunications and computer systems professionals. The vision of AlphaNet is to provide high quality, innovative and cost-effective products and services in the niche telecommunication markets.After a
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