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Watson-TDM-Manual-W.doc
Version 2.0-01
Watson TDM
Operating Manual
Revision: 2008-02-07 3-29
E1 Interface
Slave
CRC4
CRC6
TX
RX
E1
Gen
CRC6
DSL
Master
CRC6 CRC4
Test
Gen
.
CRC4/E-bit
Test
CRC6
TX
RX
E1
Test
Evaluation
G.826
Evaluation
G.826
Gen
.
Test
CRC4/
E-bit
Gen
.
Figure 3-20: E1 G.826 Performance Evaluation
On the E1 side, four CRC4 check bits are generated per sub-multiframe (SMF)
and compared with the corresponding CRC4 bits in the following SMF. If they do
not match, the CRC4 error counter is incremented. The opposite station is in-
formed of detected CRC4 errors by setting E-bits in the transmitted frames. At the
same time, the E-bits from the opposite station are counted and can be used for
performance monitoring.
For the E1 interface, calculations according to G.826 are only possible in framed
mode with CRC4 option enabled. In framed mode with CRC4 option disabled
only FAS-errors are detected.
ISDN PRA Interface
CRC4_T
CRC4_V3
TX
RX
E1
Gen
.
CRC6
DSL
Master
CRC6
Test
Gen
.
CRC6
TX
RX
E1
Test
Evaluation
G.826
Evaluation
G.826
Gen
.
Test
CRC4/
E-bit
Test
Gen
.
CRC4/E-bit
CRC6
Slave
Figure 3-21: PRA G.826 Performance Evaluation
When the PRA interface works with CRC4 processing or monitoring (options 2
and 4) four CRC4 check bits are generated per sub-multiframe (SMF) received
from the ET and the NT2/TE and are compared with the corresponding CRC4
bits in the following SMF. If they do not match, the corresponding CRC4 error
counter is incremented. At the same time, the E-bits from the ET and the NT2/TE
are counted and can be used for performance monitoring.
- Declaration of Conformity 3
- Revision: 2008-02-07 iii 5
- Revision: 2008-02-07 v 7
- Revision: 2008-02-07 vii 9
- Limited Product Warranty 11
- Table of Contents 13
- Revision: 2008-02-07 xiii 15
- Revision: 2008-02-07 xv 17
- 1 References 19
- 2 Watson TDM Overview 20
- 2.3 Accessories 21
- 3 Watson TDM Features 23
- 3.1.3 Multipair operation 24
- Revision: 2008-02-07 3-3 25
- 3.1.5 Power Backoff 26
- 3.2 E1 Interface 27
- 3.2.2 AIS Detection 28
- 3.2.3 AIS Generation 28
- 3.2.4 E1 Clock Modes 29
- 3.2.5 High Capacity E1 30
- LTUMODE 15 31
- Note: DSL Port C is unused 31
- LTUMODE 16 31
- Note: DSL Port D is unused 31
- 3.3 ISDN PRA Interface 32
- Revision: 2008-02-07 3-11 33
- Revision: 2008-02-07 3-13 35
- 3.4 nx64 kbit/s Interface 37
- 3.4.2 Handshake Operation 38
- 3.4.5 Clock Direction 39
- 3.4.6 Clock Polarity 39
- 3.4.7 Byte Timing 39
- 3.5 Timeslot Mapping 40
- 3.5.2 nx64 mappings 41
- DSLSTU-C STU-R 42
- 3.6.1 Introduction 43
- 3.6.2 Configuration 44
- 3.6.4 Multipoint Cascading 48
- 3.7 Performance Monitoring 50
- Revision: 2008-02-07 3-29 51
- 3.8 Test loops 52
- Normal Operation 53
- After Automatic Protection 53
- Switching 53
- 3.10 Password Protection 54
- 4 Watson TDM Regenerator 55
- 4.3 Cascading 56
- 4.4 Powering 56
- Revision: 2008-02-07 4-3 57
- 5 Powering 59
- 5.3 Remote Powering 60
- 5.3.4 Power Failure Alarm 61
- Loopfeedfeed 62
- 6 LEDs, Alarms 63
- 6.2 Tabletop LEDs 64
- 6.3 Alarm Conditions 65
- 6.4 Alarm Relays 66
- 6.5 Initialization Errors 66
- 7 The Monitor 67
- 7.2 Addressing 68
- 7.2.3 Tabletop 69
- 7.3 The Monitor 70
- 7.3.4 Shortcuts 71
- 7.3.5 Continuous Displays 71
- 8.1 Introduction 73
- 8.2.1 General Commands 74
- Revision: 2008-02-07 8-5 77
- 8.2.3 DSL Configuration 79
- 8.2.5 E1 Configuration 82
- 8.2.6 PRA Configuration 82
- Revision: 2008-02-07 8-11 83
- Current Status 90
- Switched Line 90
- Command 91
- ≥ 30% on channel x (A 92
- 8.3.4 Loops 95
- 8.3.5 Reset Commands 96
- 8.4.1 G.826 Statistics 97
- 8.5.1 Connection control 101
- 8.5.2 Inventory 101
- 8.5.3 Password Commands 102
- 9 Connectors 104
- Watson-TDM-Manual-W.doc 105
- Version 2.0-01 105
- Watson TDM 105
- Operating Manual 105
- Revision: 2008-02-07 9-33 105
- 9.1.2 Tabletop Modems 106
- 9.2 DSL Connector 107
- 9.3 E1 Connectors 108
- 9.3.3 75 Ohm Connectors 109
- 9.4 nx64 kbit/s Connector 110
- Revision: 2008-02-07 9-39 111
- 9.5 Monitor Connector 112
- 9.6.2 Ground connector 113
- 9.7 Regenerator Connector 114
- 10 Cables and Mechanics 115
- 10.1.2 Tabletop 116
- 10.2 Cable Reference 117
- 10.2.3 V.35 DTE Cable 119
- 10.2.4 V.35 DCE Cable 120
- 10.2.5 X.21 DTE Cable 121
- 10.2.6 X.21 DCE Cable 121
- 11.1 Interfaces 123
- 11.1.2 User Interfaces 124
- 11.1.3 Monitor Interface 124
- 11.2 Internal clock 125
- 11.4 Power Consumption 125
- 11.5 MTBF Values 126
- 11.6 Environment 127
- 12 Product Order Codes 128
- 12.3 Regenerator 129
- 12.4 Accessories 129
- 12.5 Cables 130
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