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DEFINITY Enterprise Communication Server Release 9
Getting Started with the Avaya R300 Remote Office Communicator
Issue 1
November 2000
Overview of the Avaya R300 Remote Office Communicator
6DEFINITY to remote office signal flow
1
DEFINITY to remote office signal flow
Signaling messages (as part of call processing) are sent from the Switch Processor
Element (SPE), across the internal DEFINITY backplane bus, and forwarded to the
C-LAN module. From the Ethernet output of the C-LAN board, the signaling information
is wrapped in IP packets and sent across the WAN over to the Avaya R300. The Router
Engine in the Avaya R300 directs these wrapped signalling packets across the API to the
Remote Angel (on the Combo Blade).
For a main site supported, digital station set, the bearer information is communicated from
the digital line card (for example, DCP) onto the DEFINITY TDM backplane bus and sent
over to the IP Media Processor. The Media Processor performs the TDM to IP gateway
conversion per the H.323V2 protocol.
The IP based bearer stream is communicated across the WAN to the Avaya R300. The
Avaya R300 receives the IP stream and routes it to its internal VOIP gateway, where the IP
Voice stream is converted back to TDM and passed to the Cmombo Blade. Then the
Combo Blade transforms this into an I-channel of the DCP communication channel and
sends it to the DCP digital station.
Figure 3 depicts the detailed signal stream flow of the control messages, voice bearer
channels, and the system management flows between the main DEFINITY site and the
Avaya R300.
Figure 3. Avaya R300 Serving as the WAN Access Concentrator