Panasonic KX-TDA0480 Installation Manual

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Contents

Panasonic KX-TDA0480 Installation Manual Manual pdf 14 page image

Planning14 Installation Manual• Multipoint Control Unit (MCU)GatekeepersThe Gatekeeper is the vital link in an H.323 enabled network. It acts as the central point ofmanagement for all calls within its zone and it provides call control services to all registeredendpoints.These devices perform several vital functions:• Gatekeepers are the central points at which LAN identifiers for terminals and gateways(e.g., telephone numbers) are translated into IP and IPX addresses.• Gatekeepers can perform bandwidth management tasks that help minimise the impact ofhigh network loads produced by bandwidth intensive communications.• Gatekeepers are also capable of providing additional services. For example, they can beused to balance call loads and to keep billing records for calls placed within their zone. *1GatewaysIn an H.323 network, the KX-TDA0480 is classified as a Gateway device.Gateways can provide many different kinds of service but almost all provide translationservices that enable end-point terminals of different types to communicate with one anotherseamlessly. TCP/IP network Interfaces are provided for analogue telephone and fax, a digital/analogue proprietary telephones, PBX, and PSTN networks.When the KX-TDA0480 is installed in an H.323 network, the unit is in continuouscommunication with the H.323 Gatekeeper and uses the call addressing and managementservices provided by the Gatekeeper.In addition, the KX-TDA0480 provides the interface between the worlds of voice and datacommunications, performing for example, voice compression/decompression and voice andfax data packetisation and de-packetisation.TerminalsAt a minimum, H.323 terminals support voice communications, but may also support videoand data. Three other required components are Q.931 for call signalling and call setup,Registration/Admissions/Status (RAS), which is used for Gatekeeper and Gatewaycommunications, and support for RTP/RTCP sequencing of audio and video packet data. Theserequirements apply to all H.323 devices.Although the KX-TDA0480 is capable of communicating with other H.323 compliant devices,the current implementation is intended to communicate with PSTN terminal devices such as;analogue telephones, PBXs, Key Telephone Systems, and other telephone networking devices.Multipoint Control Unit (MCU)MCUs manage the process by which calls involving three or more terminals are setup andmanaged. The capabilities may be implemented in stand-alone equipment or may be integratedinto Gateway and/or terminal devices.*1 Gatekeeper "additional services" vary based upon device manufacturer.