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Chapter 6. Loopbacks
6-4 MX2810 M13 User Manual 61185001L1-1
Figure 6-5. Digital Line/Network Loopback
Codec Line/Net
A C
ODEC
L
INE
/N
ET
loopback performs a loopback of the selected
T1/E1 in both the network and local loop directions. Both
loopbacks occur at the T1/E1 codec. Both the network and the local
loop side of the loopback are executed at the edge of the codec,
completely testing the M13 mux and the T1/E1 LIU. See Figure 6-6
for an illustration of this test.
Figure 6-6. Codec Loopback
Remote Loopback
A R
EMOTE
L
OOPBACK
performs a loopback of the selected T1/E1 on
the far-end M13 multiplexer. If an MX2810 is located at the far end,
an A
NALOG
N
ETWORK
L
OOPBACK
is executed when a R
EMOTE
L
OOPBACK
is engaged. This loopback is only available when the
DS3 is configured for C-bit parity framing since it requires the
availability of the far-end alarm and control (FEAC) channel. See
ANSI T1.107.
DSX-3
LIU
M23
MUX/DMUX
M12/G.747
MUX/DMUX
(1 of 7)
F
R
A
M
E
R
D
S
2
F
R
A
M
E
R
D
S
3
....
....
T1/E1 LIU
(1 of 28)
CODEC
(28 of 28)
CODEC
(1 of 28)
T1/E1 LIU
(28 of 28)
DSX-3
LIU
M23
MUX/DMUX
M12/G.747
MUX/DMUX
(1 of 7)
F
R
A
M
E
R
D
S
2
F
R
A
M
E
R
D
S
3
....
T1/E1 LIU
(1 of 28)
CODEC
(28 of 28)
CODEC
(1 of 28)
T1/E1 LIU
(28 of 28)
DSX-3
LIU
M23
MUX/DMUX
M12/G.747
MUX/DMUX
(1 of 7)
F
R
A
M
E
R
D
S
2
F
R
A
M
E
R
D
S
3
....
....
T1/E1 LIU
(1 of 28)
CODEC
(28 of 28)
CODEC
(1 of 28)
T1/E1 LIU
(28 of 28)
DSX-3
LIU
M23
MUX/DMUX
M12/G.747
MUX/DMUX
(1 of 7)
F
R
A
M
E
R
D
S
2
F
R
A
M
E
R
D
S
3
....
T1/E1 LIU
(1 of 28)
CODEC
(28 of 28)
CODEC
(1 of 28)
T1/E1 LIU
(28 of 28)
- M13 Multiplexer 1
- User Manual 1
- Trademark Information 2
- Service Type REN FIC USOC 3
- Warranty and Customer Service 6
- Table of Contents 10
- List of Figures 13
- List of Tables 15
- Introduction 17
- T3 OVERVIEW 18
- Chapter 1. Introduction 19
- AVAILABLE OPTIONS 20
- Installation and Operation 23
- Power Up 24
- Power Requirements 25
- RACKMOUNT INSTALLATION 27
- Connecting the Breakout Panel 27
- Rear View 28
- Front View 28
- DSX-3 Interfaces 30
- DSX-1/E1 Interfaces 30
- Power Connection 30
- FRONT PANEL 31
- ACO Buttons 31
- LED Descriptions 31
- Craft Port 35
- Configuration 39
- Chapter 3. Configuration 40
- NETWORK INTERFACE 41
- DS3 Configuration 41
- Protection Configuration 43
- Miscellaneous 43
- DS2 Configuration 43
- T1/E1 INTERFACE 44
- T1/E1 State 44
- T1/E1 Line Coding 46
- T1/E1 Line Length 46
- T1/E1 Loopback Detection 47
- T1/E1 Circuit Protection 48
- T1/E1 Line Identification 48
- XCV Threshold 49
- SYSTEM MANAGEMENT 50
- Management Options 50
- Alarm Relays 51
- SNMP Management Options 54
- System Security 59
- Date & Time 63
- ONFIGURATION 65
- UTILITIES 67
- Loading Default Settings 68
- Updating Software 68
- Utilities 71
- Resetting the System 73
- Chapter 4 75
- DS3 STATE 75
- Rx Framing 75
- Chapter 4. Status 76
- POWER SUPPLY STATE 78
- SYSTEM STATE 79
- Card A/Card B 80
- Protection 80
- Card Comm 81
- DS2 STATE 81
- T1/E1 STATE 81
- ACKNOWLEDGE ALARMS (ACO) 82
- Statistics 83
- DS3 Statistics 84
- Chapter 5. Statistics 85
- DS2 Statistics 91
- T1/E1 Statistics 93
- PROTECTION SWITCH STATISTICS 94
- Loopbacks 97
- T1/E1 LOOPBACKS 98
- Tributary 98
- Codec Line/Net 100
- Remote Loopback 100
- CSU Loopback 101
- CSU Loopback w/BERT 101
- Line BERT 102
- Line Loopback 103
- DS3 LOOPBACKS 103
- Digital Loopback 104
- Network Loopback 104
- Remote all T1/E1 105
- DS2 LOOPBACKS 105
- DS2 Network 106
- Circuit Redundancy 107
- NON-REDUNDANT MODE 108
- CIRCUIT FAILURE RECOVERY MODE 109
- Chapter 7. Circuit Redundancy 110
- Power Loss Recovery 111
- NON-REDUNDANT POWER MODE 112
- POWER SUPPLY RECOVERY MODE 113
- BATTERY BACKUP MODE 115
- Transaction Language 1 (TL1) 117
- TL1 MESSAGES 120
- TL1 Responses 121
- TL1 COMMANDS 127
- ALW-MSG-{EQPT 127
- CANC-USER; 128
- INH-MSG-{EQPT 129
- RTRV-HDR; 130
- RTRV-VER; 130
- RTRV-SYS; 130
- RTRV-USER-SECU; 130
- RTRV-ALM-{EQPT 130
- RTRV-COND-{EQPT 132
- TL1 Autonomous Messages 133
- TL1 ERROR CODES 139
- TL1 Editing 139
- Acceptance Test Procedure 153
- (TRAFFIC READINESS) 168
- MX2810 ATP CHECKLIST/SIGN-OFF 169
- Appendix B 171
- Appendix B. Pinouts 172
- DSX1/E1 Amp connectors 173
- Specifications Summary 175
- Acronyms/Abbreviations 179
- Glossary 183
- Appendix E. Glossary 184
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