APPLICATION BRIEF AB-220 SWITCHStAR family products ideally suite

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APPLICATION BRIEF AB-220 SWITCHStAR family products ideally suite

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Remote DSLAM Design using SWITCHStAR
APPLICATION BRIEF AB-220
SWITCHStAR family products ideally suited Remote Digital Subscriber Line Access Multiplexers (DSLAM) designs where quality Aswitching, power consumption, small board footprint, Industrial Temperature performance features. These designs take advantage power, small footprint, flexibility, cost that SWITCHStAR offer. This application brief will highlight typical remote DSLAM design, which would typically downstream network from Central Office environment. Often these located neighborhood curb pole, where power space constraints critical design factors. IDT77V011 DPI-to-UTOPIA Conversion Coverts 155Mbps DPI-4 322Mbps DPI-8 interface UTOPIA UTOPIA interface then support PHYs port IDT77V400 Switching Memory. Also allows Routing offers inband signalling features. Additional technical information IDT77V400 Switching Memory, IDT77V500 Switch Controller, other SWITCHStAR Networking products available Integrated Device Technology website www.idt.com.
SWITCHStAR Devices
following brief introduction SWITCHStAR Networking Products utilized this Remote DSLAM design. IDT77V400 Switching Memory Switch Fabric device through which cells stored switched. Acell memory capacity on-chip, provides ports 155Mbps (1.24Gbps aggregate bandwidth), uses Data Path Interface (DPI) provide port configurability flexibility. IDT77V500 Switch Controller Controller which provides traffic management direction through switch communication with Switching Memory. Provides Queuing, four service classes output, congestion management features, support active with on-chip memory, packetizing mode packet based protocols. IDT77V550 Switch Manager Executes configuration setting calls Table IDT77V500 inband control cells sent IDT77V400. IDT77V012 DPI-to-UTOPIA Conversion with Header Translation Accounting Provides coversion 155Mbps DPI-4 interface UTOPIA Level along with ability translate 32-bit VPI/VCI field 13bit index utilized IDT77V500. Accounting functionality basis also provided, IDT77V012 uses external SRAM (such IDT71V633) lookups.
SWITCHStAR Advantages
SWITCHStAR provides number advantages Remote DSLAM designs: Power Consumption: Each SWITCHStAR pair consumes less than 750mW, ideal remote stand alone applications where power budgets tight cooling fans impractical. Small Board Footprint: technology integrates both logic memory circuitry together smallest footprint switching solution available, ideal existing neighborhood curb/pole form factors. High Quality ASwitching: Including Queuing, Congestion Management features, four priorities output, support UBR, VBR, CBR, ABR-EFCI traffic types. Cost: Less than $100 SWITCHStAR pair. Industrial Temperature Range: Available standard product those DSLAM environments away from Central Office. High Performance: Each SWITCHStAR pair provides 1.24Gbps non-blocking switching performance.
APRIL 1999
1999 Integrated Device Technology, Inc. 5272/-
Remote DSLAM Design using SWITCHStAR
Application Brief AB-220
Remote DSLAM Example with SWITCHStAR
Figure illustrates typical Remote DSLAM design utilizing SWITCHStAR components. left side Figure represents Network side DSLAM, where addressing requirements must satisfied handled. left could handling number traffic types rates, such STM-1 OC-3 ATM. IDT77V012 input path maps full 32-bit VPI/VCI address into 13-bit index used IDT77V500 deep table, well performing conversion from UTOPIA Level DPI. IDT77V500 will then store, queue, direct traffic through IDT77V400 determined AHeader information. Upon transmission Acell from Switching Memory, IDT77V011 right side Figure (the User side DSLAM) will perform DPI-to-UTOPIA conversion. This allows DSLAM utilize multiPHY capability UTOPIA interface, directing Acell potentially individual PHYs IDT77V400 physical port. This provides over potential DSLAM User ports single SWITCHStAR pair. PHYs need only have UTOPIA interface capability utilize this feature, range type from ADSL ATM.
77V500 STM-1, OC-3, etc.
UTOPIA
PHYs Port) 77V011 77V011
77V550
77V012
77V400
71V633
UTOPIA
5272drw01
Figure Remote DSLAM using SWITCHStAR
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APPLICATION BRIEF AB-220 SWITCHStAR family products ideally suite

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