PXF4336 Datasheet, PDF (150/425 Pages) Infineon Technologies AG – ABM Premium ATM Buf fer Manager

ABM-P
PXF 4336 V1.1
Operational Description
•
Table 4-8
PHY
34 Mbit/s
Number of Possible Connections per PHY
GR = 100 Kbps
GR = 20 Kbps
349
1747
8 Mbit/s
80
403
0.6 Mbit/s
6
30
For example, if the maximum number of connections for each Subscriber is fixed (such
as 5 data connections), the queues can be pre-configured for each Subscriber so that
only the LCI assignment must be changed when a connection is setup or released.
4.2.6 Buffer Reservation
In addition to the bandwidth reservation, buffer space must be assigned by the
appropriate setting of discard thresholds.
Figure 4-9 shows an example of threshold configurations for four traffic classes (real-
time, nrt-VBR, GFR, UBR).
2**18 ^BufMax
BufMaxNg (GFR)
TrafClassMax (real-time)
BufMaxNg (nrt-VBR)
TrafClassMax (real-time)
Shared by real-time and GFR
Shared by real-tim e, GFR and nrt-VBR
TrafClassMax (GFR)
BufMaxNg (UBR)
Shared by all
TrafClassMax (nrt-VBR)
0
Figure 4-9 Example of Threshold Configuration
Sum of guaranteed buffer
Data Sheet
150
2001-12-17