PXF4336V11 INFINEON [Infineon Technologies AG], PXF4336V11 Datasheet - Page 147
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PXF4336V11
Manufacturer Part Number
PXF4336V11
Description
ABM Premium ATM Buf fer Manager
Manufacturer
INFINEON [Infineon Technologies AG]
Datasheet
1.PXF4336V11.pdf
(425 pages)
- Current page: 147 of 425
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4.2.3
In this section, a popular mini-switch scenario
important points for the software configuration of the ABM-P. Among other things, the
following fixed assignments can be made in software by the user:
• Assignment of Schedulers to PHYs and programming of Scheduler output rates
• Definition of the necessary traffic classes
• Assignment of the queues to the traffic classes
• Assignment of the queues (QIDs) to the Schedulers (SBIDs)
Assignment of Schedulers and Programming Output Rates
The ABM-P has 256 Schedulers (128 in the upstream direction and 128 in the down-
stream direction). In this example each xDSL device is assigned to a separate Scheduler
(this guarantees each xDSL device a 2-Mbit/s data throughput without bandwidth restric-
tions caused by the other xDSL devices); then, 255 xDSL devices can be connected.
The 256th Scheduler will be occupied by the E3 uplink to the public network. The assign-
ment of the Schedulers to the PHYs is totally independent and even such a strong
asymmetrical structure as in
Schedulers must be programmed in such a way that the total sum does not exceed 622
Mbit/s (payload rate). From the example, the following result is derived: 255 x 2 Mbit/s +
1 x 34 Mbit/s = 544 Mbit/s
Figure 4-7
Data Sheet
254
0
1
Uplink
34 Mbit/s
ADSL
ADSL
ADSL
ABM-P Configuration Example
ABM-P Application Example: DSLAM
= Scheduler, used as virtual PHYs ( UTOPIA PHYs)
E3
Multiplex
Network
622 Mbit/s.
(Figure
UTOPIA
4-7) can be supported. The output rates of the
147
ALP
(Figure
2Mbit/s
2Mbit/s
2Mbit/s
34Mbit/s
4-7) is used to describe the most
Operational Description
ABM-P
0
1
254
255
PXF 4336 V1.1
Uni
directional
mode
2001-12-17
ABM-P
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