Lexmark IBM 9077 - Manual (Page 55)

Router Node 37
Figure 19. SP Switch Router Adapter
The SP Switch Router Adapter is made up of two parts: the media board and
a serial daughter card.
The serial daughter card is an interface for the media board into the
crosspoint switch. This switch is the medium by which the GRF (media)
adapters talk to each other.
The purpose of the media board is to route IP packets to their intended
destination through the GRF. The SP Switch Router adapter described here is
used for routing IP packets to and from the SP Switch to other systems
connected directly or indirectly to the GRF. A brief description of the
components on the media board follows.
Receive TBICThis component receives data segments from the SP Switch
and notifies the Receive Controller and Processor that
there is data to be transferred to the buffer.
7
6
5
4
1
0
3
2
SP Switch
Crosspoint
Switch
Media Board
Receive
TBIC
Send
TBIC
FIFO
(2)
FIFO
(1)
16MB
Buffer(1)
Receive
Proc & C
Serial
Daughter
Card
16MB
Buffer(2)
Send
Proc & C