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Installation and Operation Manual Chapter 4 Troubleshooting and Diagnostics
ASM-40 Ver. 1.0 V.54 Loopback Tests 4-3
Local
DTE
Remote
DTE
Link
Interface
Link
Interface
Transmit
REM
Pressed
Receive
Receive
Local ASM-40 Remote ASM-40
Transmit
Data
Data
Clock
Clock
Figure 4-2. Remote Digital Loopback
To activate the remote digital loopback:
1. Press the REM pushbutton on the local ASM-40 front panel.
The following LEDs are ON:
Local unit: TEST, DCD, RTS, TD and RD
Remote unit: TD, RTS, and TEST.
2. Perform the BERT test as explained above for the local analog loopback test.
If an error occurs, while the local analog loopback test described above, was
successful for both the local and remote modems, the line or the line circuits
of the local or the remote unit are not operating properly.
3. After completing the test or correcting the fault, press REM pushbutton again
to restore it to the Off position.
Local Digital Loopback (DIG)
The local digital loopback (DIG) test allows the operator at the remote end to
check the performance of the local and remote ASM-40 units, and their
connecting lines. The DIG test loops the received data back to the remote ASM-
40 (see
Figure 4-3
). The local digital loopback test is equivalent to activating the
remote loopback from the remote ASM-40.
- 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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