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.
Nucom Technology, Inc.
Nucom Technology, Inc. offers Internet telephony communication services worldwide. Featuring with low cost, quick to market and advanced technology as well as the company''s 24x7 support services. Nucom provides high quality wholesale as well as retail VO
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