Avaya a500 User Guide
Cajun A500 ATM Switch Overview
Cajun A500 ATM Switch User Guide
1-21
Data Flow
There are three types of messages that the system can receive:
U PPP link packets
U PPP Data packets
U Raw packets
The Raw packets are directed to the modem script handler. The PPP data and link packets
are decoded into a PPP owned buffer and the Async buffer is returned to the Async
buffer pool. The PPP buffers are sent to the PPP daemon which sends the link packets to
the appropriate handler (LCP, IPCP).
Transmit buffers can be generated from the same 3 sources:
U Modem chat script (raw)
U PPP link information
U Application data from PNA
The link and data buffers are encoded and copied into Async buffers and then
transmitted. The raw buffers follow a similar path except they are not encoded as PPP
buffers.