Datacom DM991C - Default Chapter; Table of Contents

INDEX
1. GENERAL RECOMMENDATION.................................................10
2. INTRODUCTION..........................................................................11
2.1. DM991S/SE 2W/4W............................................................................................. 11
2.1.1. Front Panel.................................................................................................................................. 11
2.1.2. Back Panel .................................................................................................................................. 12
2.2. DM991C/CE 2W/4W ............................................................................................ 13
2.2.1. Front Panel.................................................................................................................................. 13
2.2.2. Back Panel .................................................................................................................................. 14
3. G.SHDSL INTERFACE ................................................................15
3.1. Interface Characteristics....................................................................................... 16
3.2. Handshake (Pre-activation).................................................................................. 16
3.3. Training (Activation) ............................................................................................. 16
3.4. Data Mode............................................................................................................ 17
3.4.1. G.shdsl Frame Structure ............................................................................................................. 17
3.4.2. CRC Anomaly.............................................................................................................................. 18
3.4.3. Loop Attenuation Defect.............................................................................................................. 18
3.4.4. SNR Margin Defect...................................................................................................................... 19
3.4.5. LOSW Defect .............................................................................................................................. 19
3.4.6. LOSW Failure.............................................................................................................................. 19
3.5. G.shdsl Interface Configurations .......................................................................... 19
3.5.1. Terminal Type.............................................................................................................................. 19
3.5.2. Frame Mode ................................................................................................................................ 19
3.5.3. Annex .......................................................................................................................................... 20
3.6. Performance ........................................................................................................ 20
3.7. Four wire operation (4W)...................................................................................... 21
3.7.1. Operating on two wires................................................................................................................ 21
3.7.2. Operating on four wires: .............................................................................................................. 21
3.8. Electrical Protection.............................................................................................. 21
4. V.35-V36/V.11 DIGITAL INTERFACE..........................................22
5. G.703 - G.704 INTERFACE .........................................................25
5.1. DM991S/SE ......................................................................................................... 25
5.2. DM991C/CE......................................................................................................... 26
6. ETHERNET INTERFACE.............................................................27
6.1. Ethernet physical level.......................................................................................... 27
6.2. Remote Bridge ..................................................................................................... 27
6.3. Ethernet Interface Configurations......................................................................... 27
7. STRAPS.......................................................................................29
7.1. DM991S/SE ......................................................................................................... 29
7.1.1. G.703 Interface Cable Selection (E4).......................................................................................... 29
7.1.2. Output Coaxial Cable Grounding (E10)....................................................................................... 29
7.1.3. Input Coaxial Cable Grounding (E11).......................................................................................... 29
7.1.4. G.703 Interface Pinout (E12 to E15, E27 to E30 and E44 to E47).............................................. 29
7.1.5. Digital Interface Selection (E16, E18 and E20) ........................................................................... 30
7.1.6. DB25 Connector Pinout (E31 to E41 and E48 to E59)................................................................ 30
7.2. DM991C/CE......................................................................................................... 30
7.2.1. G.703 Interface Cable Selection (E2, E3 and E25)..................................................................... 30
7.2.2. Input Coaxial Cable Grounding (E4)............................................................................................ 30
7.2.3. Output Coaxial Cable Grounding (E5)......................................................................................... 30
7.2.4. Digital Interface Selection (E10, E12 and E13) ........................................................................... 31
7.2.5. Pinning on connector DB25 (E500 to E522) – Optional .............................................................. 31
8. DIP-SWITCHES...........................................................................32
8.1. Speed Selection (DIPs A1 to A5) ......................................................................... 32
8.2. Clock Selection (DIPs A6 and A7)........................................................................ 33
8.3. LDR Enabling (DIP A8) ........................................................................................ 34
8.4. Cross-Connect CAS (DIP B1) .............................................................................. 34