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.
Caryn Systems
CARYN SYSTEMS OU was founded in Estonia in 2004 as a division of the telecommunication holding Telix Ltd., innovator in the telecom market since 1991. CARYN SYSTEMS OU provides wholesale A-to-Z VoIP termination with high quality and competitive rates. Hig
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