ZyXEL ACCESSING INTERNET & INTRANET omni series Manuel d'utilisateur Page 46
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34 ISDN Communication Basics
AT&L0 - Analog adapter 1 has the higher priority to answer a voice
or voice-band-analog-data call; if analog adapter 1 is busy, the call
will be routed to analog adapter 2.
AT&L1 - Analog adapter 2 has the higher priority to answer a voice
or voice-band-analog-data call; if analog adapter 2 is busy, the call
will be routed to analog adapter 1.
Multi auto-answering of data calls
When an ISDN data call comes in, the TA can determine the protocol
to be used in one of two ways:
1. By way of the information conveyed by the SETUP message (for
DSS1, these include the Bearer-Capability, Low-Layer-
Compatibility, or High-Layer-Compatibility information
elements; for 1TR6, these include the Service Indicator as well as
an Additional Octet of the Service Indicator)
2. By the Multi Auto-answering process. The TA determines the
protocol by monitoring the B channel signal sent by the calling
site.
With either method, the data call can be identified by the TA to be
X.75, V.110, V.120, or PPP, MPPP Async-to-Sync conversion.
If the address-matching process is again unable to tell which protocol
to use, the TA will go into its “Multi Auto-answering Routine,” by
examining the B channel data pattern and hence determine the
protocol to use.
When alerted, the TA will send a RING message to the DTE in the
following format:
RING
FM:17145522863 TO:17142630398
- User’s Manual 1
- ZyXEL Limited Warranty 2
- FCC Part 15 Information 3
- Contacting ZyXEL 5
- Contents 7
- 1 Introduction 13
- Key to Model Differentiation 14
- Key Features of the omni 14
- Intelligent Features 15
- Technical Specifications 15
- Unpacking Your omni 16
- 6 Introduction 18
- 2 Installing omni External 19
- Back Panel 21
- Connecting to Your Computer 22
- Connecting to Your ISDN Line 24
- Power On and Self Diagnostics 25
- 3 Installing omni Internal 27
- Connecting the TA to your PC 28
- Plug and Play 28
- U Interface Model 31
- S/T Interface 31
- 4 Configuring Your ISDN 33
- 5 ISDN Communication 37
- Supported AT command types: 38
- Outgoing Calls 39
- Internal) 40
- Incoming Calls 41
- Digital Data 42
- Determining the Packet Length 42
- Answering a Call using MSN 43
- Data over Speech Channel 45
- 6 Setup for Windows 95 47
- Networking 50
- CAPI Installation 54
- 7 Point-to-Point Protocol 56
- Feature list 57
- Multilink PPP 59
- Call bumping 59
- Bandwidth On Demand (BOD) 60
- BACP/BAP 61
- 8 V.110 and Synchronous 63
- Making V.110 Calls 64
- V.25bis Command Set 65
- DTR Drop-Dialing Operation 66
- 9 V.120 ISDN 69
- Configuring the V.120 mode 70
- Answering incoming calls 71
- Speeds of 128Kbps 72
- ISDN (1TR6) 75
- 64 V.120 ISDN Communications 76
- 10 X.75 ISDN 77
- Answering an X.75 call 78
- Making an X.75 Call 78
- 70 X.75 ISDN Communications 82
- 11 Handling Analog Calls 83
- Accepting an Incoming Call 85
- Feature Phone (omni.net) 87
- Call Waiting 88
- Placing a second call 88
- Receiving a second call 88
- Call Broker 89
- Call Reject 89
- Call Transfer 89
- Three-way Conference Call 89
- 12 Advanced ISDN Call 91
- AT&ZOx=s. The 93
- Answering a Call 97
- Answering a Call for 1TR6 98
- Best-effort Call Answering 98
- Data Call Indication 99
- RING <CR><LF> 100
- Placing a Call 101
- Placing a call for 1TR6 102
- Leased Line ISDN 103
- 13 Security Functions 105
- Level 1 security 106
- Level 2 security 106
- Level 3 security 106
- Security Functions 97 109
- 14 Upgrading Your omni 110
- Kernel Mode 111
- 15 Diagnostics 112
- Power-on Self-test 113
- The Diagnostic Command (ATCG) 114
- Resetting The omni 115
- Capturing the Protocol Data 116
- Analyzing the Captured Data 117
- Diagnostics 107 119
- 16 AT Command Set 120
- AT Command Descriptions 121
- Description of ATI3 Output: 129
- 124 AT Command Set Reference 136
- 17 Status Registers and 137
- Setting S-registers 138
- S-Register Descriptions 139
- ATS35.7=1<enter> 160
- 18 Phone Jack Pinout 162
- 4. Not Connected 163
- 19 Serial Port Interface 164
- 20 Index 166
- Index 155 167
- Bundled, 62 167
- 156 Index 168
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