Telephone subsystem

The infrastructure for transmission of voice is realized through an IP-based PBX. It has a voice router. According to the requirements and the provision of highly reliable IP-based telephone connectivity, there are two voice gateways available at the RIS center. Voice Gateways serve to control the terminal devices, which may be accomplished, as SCCP protocol, and in SIP protocol. IP based PBX offers all the necessary corporate services, transfer, forwarding, call holding and others.

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