參數(shù)資料
型號(hào)： PXB 4330 E
廠商： SIEMENS AG
英文描述： ATM Buffer Manager(異步傳輸模式緩沖器管理器)
中文描述： 緩沖區(qū)管理器自動(dòng)柜員機(jī)（異步傳輸模式緩沖器管理器）
文件頁(yè)數(shù)： 25/61頁(yè)
文件大小： 551K
代理商： PXB 4330 E
PXB 4330 E
ABM Buffer Configuration
Semiconductor Group
25
Application Note 11.98
In the
Figure 6
,
7
and
8
the different possibilities of the ABM cores usage in uni-
directional mode are depicted. In this mode the utilized QIDs have to be toggled
(ABRTQ=’1’) to make possible the CI/NI marking in the BRM cells. Equally the LCIs have
to be toggled (LCItog=’1’) as it is necessary for the OAM functions in ALP or AOP (if no
OAM functions are required then the LCIs can be chosen arbitrarily; that applies for the
bi-directional mode also). In both cases the respective LSB bit of the LCI or QID is always
toggled. UpQID is the QID of a queue from the upstream core and DnQID is the QID for
a queue of the downstream core.
Table 8
Setting of the ABR Flags Depending on the ABM Mode
ABM Mode
LCI
Registers
QCT1 CONFIG
LCI1
LCI0
MODE
U
7
D
7
A
x
2)
A
1
A
0
C
x
W
0
B
1
E
1
L
0
bi-directional
uni-directional with both ABM
cores has the cases:
VC uses only upstream core
30
1)
7
6
0/1
3)
0/1
4)
1
0
1
1
1
1
31
30
5)
31
30
31
30
31
30
31
30
7
6
7
u
6
u
u
u
7
6
u
6)
u
u
6
u
7
7
6
0
0
0
1
1
0
1
1
0
0
1
1
1
1
0
0
1
0
1
1
1
1
VC uses both cores
1
0
1
1
1
1
VC uses both cores
1
0
1
1
1
1
VC uses only downstream
core
uni-directional (only one ABM
core = upstream core)
1
0
1
1
1
1
-
0
0
1
1
1
1
1
1
1)
In bi-directional mode the LCIs as well as the UpQID/DnQID in upstream and downstream ABM core have to
be the same.
2)
’x’ = don’t care
3)
Depending on the LCI configuration i.e. ’0’ if the LCI of this ABR connection shall be connected with the
upstream ABM core and ’1’ for connection with the downstream ABM core.
4)
Depending on the queue configuration i.e. ’0’ if UpQID and DnQID of this ABR connection are of the same
ABM core and ’1’ otherwise.
5)
In uni-directional mode the LCIs in forward and backward direction have to be toggled (LSB inverted).
6)
’u’ = unused i.e. this UpQIDs/DnQIDs can be used of other VCs
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