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The "Interworking Element for 8 E1/T1 lines" (IWE8), PXB 4220 and PXB 4221 are members of Infineon" ATM Chipset. Together with framing and line interface components (e.g. Infineon's QuadFALC PEB 22554) the IWE8 serves as gateway between Asynchronous Transfer Mode (ATM) networks and timeslot based PDH networks. The IWE8 is a single chip multiservice device that integrates ATM cell handling and TDM circuit to ATM cell interworking in E1/T1 applications. Each of the 8 E1 or T1 input and output ports can be configured independently to operate in ATM Mode or AAL Mode. It is a very flexible solution supporting multiple services with a minimum of devices.
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Features
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Full duplex ATM Packetizer/ Depacketizer for 8 E1/T1 highways Configurable to T1 or E1 mode via external pin 8 T1/E1 ports configurable independently to ATM or AAL Mode ATM Mode: - ATM cell mapping into PDH according to ITU-T G.804 - B-ISDN User-Network Interface - Physical Layer Operation at 1544 kbit/s and 2048 kbit/s according to ITU-T I.432.3 AAL Mode (PXB 4220/4221): - AAL1 according to ITU-T I.363.1 or transparent without any adaptation layer overhead (AAL0)
- Structured T1/E1 N x 64 kbit/s service - Channel Associated Signalling (CAS) - Partially filled cells with programmable filling thresholds - Reassembly buffer can compensate up to +/- 4 ms Cell Delay Variation (CDV) - Statistics counters per channel for lost/misinserted/errored cells etc. - Internal clock recovery circuit using Synchronous Residual Time Stamp (SRTS) or Adaptive Clock Method (ACM) for unstructured CES ports. Optionally, it's possible to order the PXB 4221 device, which comes without SRTS clock recovery.
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Inverse Multiplexing over ATM (IMA) interface 8 generic framer interfaces with integrated transmit clock selector supporting - Synchronous Mode (SYM) - Generic Interface Mode (GIM) - FALC Mode (FAM): Glue-less interface for Infineon's Framer and Line Interface Components (FALC) - Echo Canceller Mode (EC): ATM cells are duplicated internally and transmitted via two framer ports UTOPIA industry standard interface: - Level 2 in slave mode; 8 data, 5 address lines - Level 1 in master/slave mode - UTOPIA clock up to 38.88 MHz
IWE8
IWE8 PXB 4220/4221
Never stop thinking.
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16-Bit generic microprocessor interface for control and configuration of the chip runs either in Intel 386EX or Motorola compatible mode External synchronous FlowThrough SSRAM 1 x 64 K x 33 Bit or 1 x 64 K x 32 Bit required Build-in data path loops for test
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Cell insertion/extraction via microprocessor interface 3.3 V power supply with 5 V tolerant inputs Typical power dissipation 1 W P-BGA 256 package Temperature range from -40 to +85C
ICRC
RAM IF
PXB 4220/PXB 4221 Networking Element for 8 T1/E1 Ports (IWE8)
T1/E1
AAL1 Mode S/P P/S ATM Mode (G.804) UTOPIA Interface
IMA Interface Processor Interface JTAG
SSRAM T1/E1 QuadFALC PEB 22554 T1/E1 QuadFALC PEB 22554 IWE8 PXB 4220 PXB 4221 UTOPIA
PXB 4220/PXB 4221 Application Example: Line Interface Card
ATM Layer Device (e.g. ABM, IMA FPGA,...)
UTOPIA
Microcontroller
How to reach us: http://www.infineon.com Published by Infineon Technologies AG, Bereich Kommunikation, St.-Martin-Strasse 53, D-81541 Munchen (c) Infineon Technologies AG 2000. All Rights Reserved.
Attention please! The information herein is given to describe certain components and shall not be considered as warranted characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Infineon Technologies is an approved CECC manufacturer. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office in Germany or our Infineon Technologies Representatives worldwide.
Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in lifesupport devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. Ordering No. B119-H7648-X-X-7600 Printed in Germany PS 04005. NB
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