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MT90221AL Datasheet(PDF) 3 Page - Mitel Networks Corporation |
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MT90221AL Datasheet(HTML) 3 Page - Mitel Networks Corporation |
3 / 114 page MT90221 i Table of Contents 1.0 Device Architecture ....................................................................................................................................... 8 1.1 Software Functions..................................................................................................................................... 8 1.1.1 Link State Machines........................................................................................................................... 8 1.1.2 IMA Group State Machines ................................................................................................................ 8 1.1.3 Link Addition, Removal or Restoration............................................................................................... 8 1.1.4 Interrupt.............................................................................................................................................. 8 1.1.5 Signaling and Rate Adjustment.......................................................................................................... 8 1.1.6 Performance Monitoring..................................................................................................................... 8 1.2 Hardware Functions ................................................................................................................................... 9 2.0 The ATM Transmit Path ................................................................................................................................. 9 2.1 Cell_In_Control........................................................................................................................................... 9 2.2 The ATM Transmission Convergence ...................................................................................................... 10 2.2.1 TX Cell Ram and TX FIFO Length ................................................................................................... 10 2.3 Parallel to Serial PCM Interface ............................................................................................................... 11 2.4 ATM Transmit Path in IMA Mode ............................................................................................................. 11 2.4.1 IMA Frame Length (M) ..................................................................................................................... 11 2.4.2 Position of the ICP Cell in the IMA Frame........................................................................................ 11 2.4.3 Transmit Clock Operation ................................................................................................................ 11 2.4.4 Stuff Cell Rate .................................................................................................................................. 12 2.4.5 IMA Data Cell Rate .......................................................................................................................... 12 2.4.6 IMA Controller (RoundRobin Scheduler).......................................................................................... 12 2.4.7 ICP Cell Generator........................................................................................................................... 12 2.4.8 IMA Frame Programmable Interrupt ................................................................................................ 14 2.4.9 Filler Cell Definition .......................................................................................................................... 14 2.4.10 TX IMA Group Start-Up.................................................................................................................... 14 2.4.11 TX Link Addition ............................................................................................................................... 14 2.4.12 TX Link Deletion............................................................................................................................... 14 2.5 ATM Transmit Path in UNI Mode ............................................................................................................. 14 3.0 The ATM Receive Path................................................................................................................................. 15 3.1 Cell Delineation Function ......................................................................................................................... 15 3.2 De-Scrambling and ATM Cell Filtering ..................................................................................................... 16 3.3 ATM Receive Path in IMA Mode .............................................................................................................. 16 3.3.1 ICP Cell Processor........................................................................................................................... 17 3.3.1.1 IMA Frame Synchronization ...................................................................................................... 17 3.3.1.2 Link Information......................................................................................................................... 18 3.3.1.3 RX OAM Label .......................................................................................................................... 18 3.3.2 Out of IMA Frame (OIF) Condition ................................................................................................... 18 3.3.3 Link Out Of IMA Frame (LIF) Synchronization ................................................................................. 18 3.3.4 Filler Cell Handling ........................................................................................................................... 18 3.3.5 Stuff Cell Handling ........................................................................................................................... 18 3.3.6 Received ICP Cell Buffer .................................................................................................................. 18 |
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