Datasheet

____________________________________________________ DS34S101, DS34S102, DS34S104, DS34S108
Rev: 032609 72 of 198
10.6.11.8 TDM to Ethernet Flow
Each payload-type machine receives the data of specific bundle timeslots and maps it into packets. To store a new
packet in preparation, the machine extracts a pointer from the free buffer pool (section 10.6.11.7) and fills the
associated buffer with TDM timeslot data, one by one. When a packet is completed in a buffer, the payload-type
machine places the buffer pointer in the Ethernet Tx queue. The Tx Ethernet interface polls the queue, extracts the
pointer, and transfers the packets from the buffer to the Ethernet MAC block, to be sent over the Ethernet network.
Then, it returns the pointer to the free buffer pool. The buffer can then be used again by the payload-type machine
to store subsequent TDM data for the bundle.
Figure 10-51. TDM-to-Ethernet Flow
TX
AAL1
TX
HDLC
SDRAM
DATA
FREE
BUFFER
POOL
ETH
TX
QUEUE
TX
ETH
INTERFACE
ETH
MAC
TDMoP BLOCK
TX
RAW
Pointers