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Technical Reference for ZyXEL omni.net series
8-13
It takes about 2 seconds for the calling ISDN TA to send XID and wait until time out. If you know
in advance that the called site has no V.42bis capability, it is advisable to issue the AT&K00
command beforehand in order to get a quick connection.
Although not defined in X.75, XID frame is based on the encoding in ISO Standard 8885 and is
used in V.42/V.42bis. In addition to the compression parameters, XID can be used to negotiate the
packet parameters for example as window size or packet size.
Selecting V.120 for European ISDN (DSS1)
With European ISDN, V.120 is an option in the Bearer Capability (BC) information element, which
is a mandatory information element in the SETUP message. Although we can specify V.120 in the
Low-Layer-Compatibility (LLC) information element, some switches just don't deliver the LLC.
Other switches do deliver the LLC, but the V.120 selection will be discarded midway.
If the called ISDN TA does not get any B-channel protocol information from the incoming SETUP
message and the remote device is a ZyXEL ISDN device, the called ISDN TA will be able to
identify the V.120 protocol automatically with the Multi Auto-answer routine. Otherwise, with
other ISDN devices, the handshake will fail.
Security Settings
The omni.net LCD/Plus/D provides security functions used to prevent unauthorized connections.
Your omni.net ISDN TA features two security types with three levels of checks for added
flexibility in the device you are connecting to and the transmission protocols you are using.
Two types of security functions are provided.
# Type 1 Security is exclusively used when the remote device is ZyXEL ISDN TA.
# Type 2 Security can be used with remote ISDN TAs of any brand (including ZyXEL ISDN
TAs).
With a Type 1 connection, the dial-in (remote) ZyXEL ISDN TA will send in its supervisor
- 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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