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Technical Reference for ZyXEL omni.net series
8-4
V.120 Outgoing Protocol
Some switches transmit all network signals through the D-channel (out-of-band signaling), allowing both
B-channels to be used exclusively for your communication purposes. This allows for throughput of 64Kbps per
channel. However, not all switches support out-of-band signaling at this time. For switches that do not support
out-of-band signaling, network signals are transmitted through the B-channels. This reduces the bandwidth to
56Kbps.
When you are making a V.120 call, make sure that the communication supports out-of-band signaling. If it
does not support out-of-band signaling, you will need to set your omni.net to 56K mode using the [AT&E1]
command ([AT&E0] to set it back to 64k mode.) If your ISDN TA is on the receiving end, you can keep the
setting at AT&E0, 64k data mode. The omni.net will automatically switch between the two speeds in answer
mode.
Type AT
Command
Description omni.net Response
ATB20<Enter>
Select V.120 for communication.
OK
AT&E0<Enter>
Select 64K data mode.
OK
AT&E1<Enter>
Select 56K data mode.
OK
Now you are ready to dial the phone number. If you need to save the setting into non-volatile RAM, issue the
following commands:
AT&W0<Enter>
Save the settings to profile 0
[Profiles available: 0-3]
OK
ATZ0<Enter>
Save stored settings as the power on
settings to profile 0. [Profiles available:
0-3]
OK
All the above commands can be simplified by combining all of the commands onto one line as follows:
& AT&B20&E1&WZ0<Enter>
Finally, use the [ATDIn] command to make the call ('n' is the phone number you wish to dial). Once the
connection is made, you should see the following connect message.
ATDIn
CONNECT 115200/V120 56000/LAPD
This indicates that the connection is made with:
) DTE speed of 115,200bps.
) V.120 Protocol
) Data Speed of 56,000bps.
) Error Control LAPD.
Table 45. V.120 Outgoing Protocol
- ISDN Terminal Adapters 2
- Limited Warranty 3
- Become a Registered Owner 3
- Contents 5
- PART II ISDN FUNCTION 6
- PART III VOICE FEATURES 7
- PART IV DATA FUNCTION 8
- PART V FAX/MODEM FUNCTION 9
- PART VII APPENDICES 10
- Content of Tables 13
- Content of Figures 17
- Preface 18
- How to Use This Manual 19
- Other References 19
- Part I 21
- Introduction 21
- Chapter 1 23
- Intelligent Features 24
- Specifications 24
- Key Features Summary 25
- Chapter 2 27
- ISDN Configuration Manager 27
- Bumping 31
- Configuring ISDN Parameters 32
- Chapter 3 33
- LCD/LCD+M) 33
- LCD Panel Functions 34
- Right key: 35
- Left key: 35
- Up key: 35
- Down key: 35
- Idle Screen 36
- Set Clock sub-menu 36
- Set Display Mode sub-menu 36
- Dial In Log 37
- Stored Phone List 37
- Dial Out Log 38
- Active Status 39
- Clock Options 40
- Update Clock 41
- Set Display Mode 42
- Dial In Log Options 43
- button 44
- Dial Out Log Options 45
- Part II 47
- ISDN Function 47
- Chapter 4 49
- ISDN Communication Basics 49
- Supported AT Command Types 51
- LCD/LCD+M/Plus) 54
- Placing a Data Call 55
- Incoming Calls 55
- Command Description 58
- ATS119.3=0 58
- ATS119.3=1 58
- Best effort call answering 58
- Part III 61
- Voice Features 61
- Supplementary Service 63
- Chapter 5 63
- Call Waiting 64
- Call Hold/Retrieve 64
- Three Way Conferencing 66
- Starting a conference call 66
- Call Forwarding 68
- For DSS1 switch 68
- Chapter 6 71
- Feature Phone Operation 71
- Flash Key Commands 72
- InterCom 72
- Receiving a Second Call 73
- Call Broker 74
- Call Reject 75
- Call Transfer 75
- Three-Way Conference Call 76
- Last Number Redial 77
- Quick Dial 77
- Part IV 79
- Data Function 79
- Chapter 7 81
- Feature List 82
- Async to Sync Conversion 82
- Authentication Conversion 82
- Multilink PPP 84
- Call Bumping 84
- Bandwidth On Demand (BOD) 86
- BACP/BAP 86
- Chapter 8 89
- ISDN Communications 89
- V.110 Outgoing Protocol 91
- V.120 Outgoing Protocol 92
- X.75 Outgoing Protocol 93
- Speeds of 128Kbps 95
- V.120 Bundled Call 95
- X.75 Bundled Call 97
- Table 52. V.42bis AT Command 98
- Data Compression with X.75 100
- Security Settings 101
- Modifying the User Passwords 105
- Password: 106
- Part V 107
- Fax/Modem Function 107
- Chapter 9 109
- Internal Fax/Modem Function 109
- MNP Protocols 110
- Xmodem, Ymodem, and Zmodem 110
- Fax and Facsimile 111
- Modem as a fax 111
- EIA Class 1 Fax Commands 111
- Answering a Call Using MSN 113
- Control Data Compression 115
- Fax Operation 115
- Fax Command Sets 116
- Appendix D) 118
- Part VI 119
- Diagnostics 119
- Firmware Update 119
- Chapter 10 121
- Power-on Self-test 122
- Resetting Your omni.net 124
- Capturing the Protocol Data 125
- Analyzing the Captured Data 126
- Chapter 11 129
- Firmware Upgrade 129
- Kernel Mode 130
- Part VII 133
- Appendices 133
- Appendix A 135
- AT Command Set Reference 135
- AT Commands Description 136
- AT Commands Prefix (AT) 136
- Description of ATI3 Output 144
- Fax Command 151
- Appendix B 153
- Setting S-registers 154
- S-Register Descriptions 156
- Appendix C 181
- Appendix D 183
- Serial Port Interface 183
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