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Chapter 1 Introduction Installation and Operation Manual
1-2 Overview ASM-40 Ver. 1.0
Features
ASM-40 operates at 13 selectable rates of up to 2048 kbps, for a line
attenuation of up to 40 dB on twisted pair or coax cable. This provides an
approximate operating range of up to 1.75 km (1 mile).
ASM-40 incorporates interface circuits for the terminal/computer, an automatic
equalizer, a modulator and demodulator. Coupling to the line or coax cable is
protected by isolation transformers, which, in conjunction with other circuitry,
guard against AC or DC voltage surges. The protection circuitry enables operation
even when a DC power source is connected to the line.
Zero suppression on the link is switch-selectable for either AMI, HDB3, or B8ZS
coding, according to ITU G.703 standard.
DTE Interface
The DTE port has modular, field-changeable interfaces: V.24, V.35, X.21, RS-530,
V.36/RS-449, G.703-HDB3, G.703 Codirectional (64 kbps), Ethernet bridge
(IR-ETH), Ethernet/Fast Ethernet bridge with VLAN support (IR-ETH/QN), or
IP-router (IR-IP). The G.703-HDB3 interface supports data rates of 128, 256, 512,
1024, or 2048 kbps.
Timing
Transmit and receive timing can be provided internally, or derived externally from
the data terminal or receive signal. Internal FIFOs provide jitter attenuation or
phase difference correction either from the incoming analog signal (line side) or
from the external clock on the DTE side.
Diagnostics
ASM-40 provides local analog, remote digital and local digital loopbacks in
compliance with the V.54 standard. The loopbacks are activated manually via the
front panel pushbuttons. In addition, the local analog and remote digital
loopbacks are initiated via the DTE interface pins (”HH” and “JJ” for V.35 or 18
and 21 for RS-530 or V.24).
ASM-40 includes internal Bit Error Rate Tester (BERT) for complete testing of the
local and remote modem and the link quality without any need for external test
equipment. ASM-40 runs an internal pseudo-random 511-bit test pattern in
accordance with the ITU V.52 standard.
- 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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