pxb4219 Infineon Technologies Corporation, pxb4219 Datasheet - Page 87

• Manufacturer Part Number: pxb4219
• Description: Iwe8 Interworking Element For 8 E1/t1 Lines
• Manufacturer: Infineon Technologies Corporation

Table 22
RAM
4.11
The two LSB bits of a slot entry identify the slot type:
Table 21
Slot Type
4.11.1
The IWE8 supports any mapping scheme of ATM cells into N of the 32 timeslots of the
framer interfaces.
The mapping scheme is defined by programming 32 slot positions in the internal RAMs.
RAM1 is used for receive port configuration and RAM2 for transmit port configuration.
• For each configuration exactly one timeslot should be programmed as the “ATM
• Depending on the Link data rate 29 (E1) or 23 (T1) timeslots should be programmed
• The remaining unused slots should be programmed as “AAL Idle Slots”.
For mapping of ATM cells in T1/E1 frames according to ITU-T G.804 [26] the internal
RAM slot positions should be programmed as shown in
Data Sheet
Slot Slot
ATM/AAL Idle
ATM/AAL Continuation
ATM/AAL Reference
Reference Slot”.
as “ATM Continuation Slots”.
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
ATM Mode
Mapping of Channels to Timeslots
ATM Idle
ATM Reference
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
RAM Slot Type
Coding of Slot Type in internal configuration RAMs
RAM slot positions for ITU-T G.804 compliant ATM mapping
E1
Slot
1
2
3
4
5
6
7
ATM Idle
ATM Reference
ATM Continuation
ATM Continuation
ATM Idle
ATM Continuation
ATM Continuation
ATM Continuation
ATM Idle
ATM Continuation
T1 in FAM
Bit 1
RAM Slot Type
87
0
1
X
PXB4219 / PXB4220 / PXB4221
Table
Slot
Operational Description
10
22.
1
2
3
4
5
6
7
8
9
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Continuation
ATM Reference
ATM Continuation
ATM Continuation
T1 in GIM
RAM Slot Type
Bit 0
0
0
1
2002-05-06