TMXF28155 Supermapper
155/51 Mbits/s SONET/SDH x28/x21 DS1/E1
Data Sheet
June 2002
482
Agere Systems Inc.
21 28-Channel Framer Block Functional Description
Table of Contents
Contents
Page
21 28-Channel Framer Block Functional Description .........................................................................................4802
21.1 28-Channel Framer Introduction ..............................................................................................................486
21.1.1 DS0/E0 Switching Applications ..................................................................................................... 486
21.2 Transport Applications..............................................................................................................................489
21.3 Framer-to-Line Interface Unit Physical Interface......................................................................................492
21.3.1 Line Interface References/Standards ........................................................................................... 492
21.3.2 Frame Formats ............................................................................................................................. 492
21.3.3 Transmit Framer Functions ........................................................................................................... 493
21.3.4 Framing References/Standards .................................................................................................... 493
21.4 DS1 Transparent Framing Format ...........................................................................................................493
21.5 CEPT 2.048 Basic Frame Structure Transparent Framing Format..........................................................494
21.6 Receive Framer Nonalignment Mode (DS1/E1).......................................................................................495
21.6.1 Loss of Frame Alignment Criteria ................................................................................................. 495
21.7 Frame Alignment Criteria .........................................................................................................................496
21.8 Receive and Transmit Signaling Processor .............................................................................................496
21.8.1 Signaling Introduction and Feature Description ............................................................................ 496
21.8.2 Signaling References/Standards .................................................................................................. 497
21.9 Receive Signaling Per-Link Feature Provisioning ....................................................................................497
21.9.1 Signaling State Mode Source Selection ........................................................................................ 498
21.9.2 Signaling State Mode Selection .................................................................................................... 498
21.9.3 Signaling Source Selection ........................................................................................................... 498
21.9.4 Signaling Destination Selection .................................................................................................... 499
21.10 Optional Receive Signaling Features Provisioned for Each Link...........................................................501
21.10.1 Support of DS1 Robbed-Bit Stomping ........................................................................................ 501
21.10.2 Support of CEPT Time Slot 16 Stomping ................................................................................... 501
21.10.3 Support of Signaling Debounce .................................................................................................. 501
21.10.4 Support of Japanese Handling Groups ....................................................................................... 501
21.11 Receive Signaling Global Feature Provisioning .....................................................................................501
21.11.1 Link Count Selection ................................................................................................................... 502
21.12 Other Receive Signaling Global Features..............................................................................................502
21.12.1 Support of Automatic Signaling Freeze on Framing Bit Errors ................................................... 502
21.12.2 Support of Change of Signaling State FIFO ............................................................................... 502
21.13 Receive Signaling Interrupts ..................................................................................................................503
21.13.1 Maintenance of the Change of Signaling State FIFO Status Bits ............................................... 503
21.13.2 Maintenance of Handling Group-Related Status Bits ................................................................. 503
21.14 Transmit Signaling Per-Link Feature Provisioning.................................................................................504
21.14.1 Signaling State Mode Source Selection ...................................................................................... 504
21.14.2 Signaling State Mode Selection .................................................................................................. 505
21.14.3 Signaling Source Selection ......................................................................................................... 505
21.14.4 Signaling Destination Selection .................................................................................................. 507
21.15 Optional Transmit Signaling Features Provisioned for Each Link..........................................................508
21.15.1 Support of Automatic Maintenance of the Time Slot 16 Remote Frame Alarm .......................... 508
21.15.2 Support of DS1 Robbed-Bit Stomping ........................................................................................ 508
21.15.3 Support of CEPT Time Slot 16 Stomping ................................................................................... 508
21.15.4 Support of Signaling Debounce .................................................................................................. 508
21.15.5 Support of Japanese Handling Groups ....................................................................................... 508
21.15.6 Support of Zero-Code Suppression ............................................................................................ 508