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Chapter Two: Getting Started 3. Choose a connection protocol
19
3. Choose a connection protocol
Usage of the ISDN link is governed by the type of connection protocol you choose. The connection protocol
defines the rules by which ISDN channels are enabled and disabled. The type of protocol you choose to use
depends on the type of connections you plan to make.
Important ISDN concepts
Before you can decide on a connection protocol, you must become familiar with the following ISDN concepts.
ISDN channels
ISDN lines are defined in terms of channels, with each channel supporting a specific type of communication.
The DIVA LAN ISDN Modem supports two ISDN channel types:
• D-channel: The Device channel is used to control the setup of ISDN connections on the other channels.
They can also be used to transmit packet data traffic. The D-channel has a transmission speed of 16 kbps.
• B-channel: Bearer channels are used to carry data or voice traffic. They have a transmission speed of 56
or 64 kbps.
ISDN access interfaces
An access interface is the physical connection between you and an ISDN network. It defines the number of D-
and B-channels that are available to you and the total transmission speed of the connection. The DIVA LAN
ISDN Modem supports a single Basic Rate Interface (BRI), which is comprised of one D-channel (16 kbps)
and two B-channels (64 kbps) for a total user bit rate of 144 kbps.
Each ISDN B-channel can have its own telephone number. Although in some cases you will only get one
number for both channels unless you order supplementary services.
ISDN channel usage
The following diagram shows all the potential connections a DIVA LAN ISDN Modem could make, if it was
configured to support an Internet connection, a corporate network connection, incoming data calls, and analog
calls on both PHONE ports.
All connections, both data and voice, are carried on the B-channels. (AO/DI enables you to also use the
D-channel for data connections, but this exception will be discussed later.) The DIVA LAN ISDN Modem
dynamically assigns B-channels on-demand. Therefore, there is no guarantee which B-channel a specific
connection will receive. The same is true for your ISDN phone numbers. Your first phone number does not
necessarily map to ISDN channel B1.
ISDN BRI Line
Internet Connection
Corporate Network Connection
Incoming Data Call Connection
PHONE port #1
PHONE port #2
D-channel
1st B-channel
2nd B-channel
- DIVA LAN ISDN Modem 1
- User’s Guide 1
- Table of Contents 3
- Chapter Three: 4
- Chapter Four: 4
- Chapter Five: 4
- Chapter Six: 5
- Chapter Seven: 5
- Chapter Eight: 6
- Chapter Nine: 6
- Chapter Ten: 6
- Appendix A: 7
- Appendix B: 7
- Appendix C: 7
- Appendix D: 8
- Introduction 9
- Internet 10
- Connecting more computers 12
- Total network security 12
- Summary of features 13
- Contacting customer services 14
- Getting Started 15
- 1. Installation overview 16
- 2. Prepare for installation 17
- Important ISDN concepts 19
- ISDN channel usage 19
- Multilink PPP 20
- Multilink PPP + BACP 20
- Multilink PPP + AO/DI 20
- Gather ISDN information 22
- Gather X.25 information 23
- Gather V.120 information 23
- Power Supply 24
- FaxPhone 24
- ISDN Wall Outlet 24
- To install Modem Monitor 26
- What’s next? 34
- Starting Modem Monitor 36
- Properties dialog box 37
- Utilities dialog box 38
- Options dialog box 38
- Status Viewer 39
- Profile table 40
- Utilities 40
- Chapter Four 41
- Saving configuration settings 43
- Getting help 43
- General settings 43
- Connection profile settings 43
- Editing the ISP profile 44
- Editing LAN settings 45
- Viewing status information 46
- Obtaining statistics 47
- Eicon\DIVA LAN ISDN Modem\ELM 48
- Resetting to factory defaults 49
- Minimizing ISDN Charges 50
- The Cost Control page 51
- Data call thresholds 52
- ISDN billing intervals 52
- Configuring BACP 53
- Configuring AO/DI 54
- X.25 on the D-channel 56
- Click Save 57
- Click Reset 57
- Setting ISDN active intervals 58
- Spoofing NetBIOS services 59
- Data compression 60
- Manual dialing 61
- Restricting analog calls 62
- Data over voice 63
- Traffic filtering 64
- Security 65
- Security features 66
- System password 67
- Automatic log out 67
- Network address translation 68
- Remote management 70
- Incoming data calls 72
- Call authentication 74
- Custom security features 78
- Setting up the Phone Ports 79
- Assigning phone numbers 80
- Call bumping 84
- Supplementary services 86
- Call Hold 87
- Call Waiting 87
- Notes on call bumping 89
- Call Forwarding 90
- Three-party Conference Call 91
- Terminal Portability 92
- Chapter Eight 93
- Overview 94
- 1. Gather information 95
- Minimizing your ISDN charges 100
- Configuring security features 101
- Advanced Installations 102
- Connection retries 103
- Using Modem Monitor 104
- Manual installation 105
- 106 106
- To create a VPN 108
- Connecting to the VPN 109
- Defining routes 110
- IP routes 111
- 117 117
- 118 118
- IP filters 119
- Default filters 120
- To define a filter 120
- Action Direction 121
- Source /Destination 121
- Location 121
- ProtocolAddress 121
- 122 122
- IP filtering examples 123
- 124 124
- Blocking web surfing 125
- 126 126
- Making a V.120 connection 127
- 128 128
- SecurID support 129
- 130 130
- Other Configuration Tools 131
- Configuration options 132
- Web interface 133
- TFTP interface 133
- 134 134
- DTMF interface 135
- Command line interface (CLI) 136
- 137 137
- About configuration context 138
- Connection profiles 138
- Default profiles 138
- Command line reference 138
- Loading firmware with the CLI 138
- 139 139
- TCP/IP Configuration 140
- Installing TCP/IP 141
- Configuring TCP/IP 141
- 142 142
- 143 143
- 144 144
- Configuring TCP/IP on an iMac 145
- Technical Information 146
- 147 147
- E1, E2, E3, E4 148
- 149 149
- 150 150
- Termination 151
- Command Line Reference 152
- Notational Conventions 153
- Commands 154
- Callback 155
- Call screening 156
- Call thresholds 157
- 158 158
- 159 159
- Ethernet 160
- 161 161
- 162 162
- 164 164
- 165 165
- 166 166
- IP routing 167
- IP various 167
- 168 168
- 169 169
- 170 170
- 171 171
- ISDN Access Time 172
- Logging and Mail Trace 173
- 174 174
- SHOW MLPPP CONFIGURATION 175
- 176 176
- 177 177
- 178 178
- 179 179
- 180 180
- Profiles 181
- 182 182
- 183 183
- 184 184
- Time Protocol 185
- 186 186
- V.120 Scripting 187
- 188 188
- 189 189
- Regulatory Information 190
- Safety Status: TNV-1 191
- Power Consumption 191
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