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- MARQUE LIVRES
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Chapter 4 Troubleshooting and Diagnostics Installation and Operation Manual
4-4 Internal BERT ASM-40 Ver. 1.0
Local
DTE
Remote
DTE
Link
Interface
Link
Interface
Transmit
DIG
Pressed
Receive
Receive Transmit
Data
Data
Clock
Clock
Local ASM-40 Remote ASM-40
Figure 4-3. Local Digital Loopback
To activate the local digital loopback:
• Press the DIG pushbutton on the local ASM-40 front panel.
The following LEDs are ON:
Local unit: TEST, RTS, and TD
Remote unit: DCD, RTS, TD and RD.
You can activate the local digital loopback by running remote digital loopback at
the remote unit. If the V54E section of the SW3 DIP switch is set to ON, the local
ASM-40 closes the DIG loopback when it detects the RLB activation at the remote
end.
4.2 Internal BERT
ASM-40 has a built-in BERT circuit consisting of a pattern generator and a pattern
tester. This circuit works in conjunction with the V.54 diagnostic loops and the
remote BERT to verify normal system operation and identify faulty equipment in
the event of the system failure.
The pattern transmitted by the BER system can be looped back for comparison
(modem self-test) or can be received by another ASM-40 (Two-BER test).
When used opposite another ASM-40, the complete link can be tested either
when the PATT button is pressed, or with external BERT transmitting the same
511-bit pattern.
Modem Self-Test
The test verifies that the modem is operating correctly (see
Figure 4-4
).
To activate the modem self-test:
1. Press the ANA pushbutton on the front panel. The TEST and DCD LEDs light
up.
Note
- High-Speed Short-Range Modem 1
- Limited Warranty 4
- Product Disposal 4
- General Safety Instructions 5
- Safety Symbols 5
- Handling Energized Products 6
- Attention 8
- FCC-15 User Information 9
- Declaration of Conformity 10
- Quick Start Guide 11
- 2. Operating ASM-40 13
- • DCD: On 14
- • TEST: Off 14
- Contents 15
- Chapter 1 17
- Introduction 17
- Features 18
- 1.2 Physical Description 19
- 1.3 Functional Description 19
- Timing Generator 20
- G.703-HDB3 Interface Timing 21
- Encoder/Decoder 22
- Line Driver 22
- 1.4 Technical Specifications 23
- Chapter 2 27
- Installation and Setup 27
- 2.2 Package Contents 28
- 2.3 Installation and Setup 28
- MT RCV GND 31
- Connecting the Line 32
- Connecting the DTE 32
- Connecting the Power 33
- Chapter 3 35
- Operation 35
- 3.2 Operating Procedure 36
- Normal Indications 37
- Turning ASM-40 Off 37
- Chapter 4 39
- Troubleshooting and 39
- Diagnostics 39
- Local Analog Loopback (LLB) 40
- Local Digital Loopback (DIG) 41
- Local ASM-40 Remote ASM-40 42
- 4.2 Internal BERT 42
- Two-BERT Test 43
- ASM-40 ASM-40 44
- Chapter 5 45
- ASM-40/R Card 45
- AC Supply 46
- 5.3 ASM-40/R Front Panel 47
- Figure 2-1 49
- Table 2-1 49
- Figure 5-4 49
- Connecting the Interfaces 51
- Appendix A 53
- Pinouts 53
- Table A-2 56
- Connection 57
- Chassis Ground 58
- RCV1* (input) 58
- RCV2 (input) 58
- XMT1 (output) 58
- XMT2* (output) 58
- Table A-6 59
- Appendix B 61
- IR-ETH Interface Module 61
- XMT RCV GND 62
- General 62
- Opening the ASM-40 Case 63
- Setting the DIP Switch 64
- Closing the ASM-40 Case 64
- LED Indicators 64
- Connecting the LAN 65
- Appendix C 67
- IR-ETH/QN (IR-ETH/Q) 67
- Interface Module 67
- ACT LINK 68
- IR-ETH/QN 68
- Setting the DIP Switches 70
- Appendix D 73
- IR-IP Interface Module 73
- D.2 Technical Specifications 74
- D.3 Physical Description 74
- IR-IP LEDs 75
- Connecting the Telnet Host 79
- What to Do If 81
- General Operating Procedures 82
- Figure D-5. IR-IP Main Menu 83
- Figure D-6 83
- D.7 Quick Setup Menu 84
- WAN IP Address 85
- WAN IP Mask 85
- Default Gateway 85
- D.8 Management Access Menu 86
- D.9 Advanced Setup Menu 87
- Device Identification Menu 88
- Interface Parameters Menu 88
- LAN Status 89
- WAN Status 89
- WAN Throttle 89
- Quick Setup Menu 90
- Figure D-7 90
- Figure D-13 90
- Protocol Field Compression 91
- Authentication Protocol 91
- Security Host/Guest 91
- User Name To Send 92
- Password To Send 92
- User Name To Accept 92
- Password To Accept 92
- Multicast IP Menu 93
- D.10 Device Control Menu 94
- New Software Download Menu 95
- View Error Log Screen 96
- Resets Menu 96
- Reset Device 97
- Reset LAN 97
- Reset WAN 97
- D.11 View Menu 98
- ARP Tables 99
- Statistics Screen 100
- Figure D-26 101
- Using the Ping Function 102
- D.14 Erasing IR-IP Software 104
- Performing 105
- Preliminary Configuration 105
- IR-G.703 Interface Module 107
- Appendix E 107
- EXT Timing 108
- INT/RCV Timing 109
- Customer Response Form 111
- Error Report 113
- Innovative Access Solutions 116
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