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PN1197-00 Revision 1.0
3 CDPD Security Features
Airlink security
The Cellular Digital Packet Data (CDPD) network is a public wireless
data communications service vulnerable to casual eavesdropping. To
minimize this possibility, a data encryption mechanism is provided for
all non-broadcast communications between the Mobile Data Intermediate
System (MDIS) and the Mobile End System (M-ES).
If activated by the carrier, encryption services are implemented by the
MDIS. At registration time the Data Access Radio Transmitter (DART)
200 is told, during session negotiation, whether or not encryption is
being used. The M-ES has no choice and follows the lead of the MDIS in
using or not using encryption
Authentication services
M-ES authentication is provided within the CDPD network to prevent
fraudulent use of the network. This mechanism is implemented by the
MDIS, as follows:
1. The MDIS validates the Authentication Data (credentials) presented
by the M-ES at registration time by comparing them against
information stored in the MDIS authentication table.
2. If the credentials are acceptable to the MDIS they are updated, stored
back into the MDIS authentication table, and also sent back to the
M-ES for use when it next registers. Registration is denied if the
M-ES presented credentials do not match those stored for its
Network Entity Identifier (NEI) by the MDIS.
When an IP Address is first authorized for use by the carrier, or an IP
Address is loaded into a modem, the associated credentials are set to
zero. On each subsequent registration the credentials are for the IP
Address are updated as described in steps 1 and 2 above.
Chapter
- DART 200 CDPD Modem 1
- Sierra Wireless, Inc. ii 2
- Important Notice 3
- Contact Information 3
- Safety and Hazards 3
- Sierra Wireless, Inc. iv 4
- Contents 5
- 2 Installation and Setup 2-1 6
- 3 CDPD Security Features 3-1 6
- 6 Device Attachment 6-1 7
- 8 Application Programming 8-1 7
- Sierra Wireless, Inc. viii 8
- PN1197-00 Revision 1.0 ix 9
- H Problem Sheet H-1 10
- Glossary Glossary-1 10
- Index Index-1 10
- Notes Notes-1 10
- PN1197-00 Revision 1.0 xi 11
- Sierra Wireless, Inc. xii 12
- About This Guide 13
- Related reading 15
- Compliances 16
- Safety information 17
- Sierra Wireless, Inc. xviii 18
- 1 Introduction 19
- New for this version 20
- Migration considerations 20
- CDPD network overview 21
- AT command set summary 22
- PN1197-00 Revision 1.0 1-5 23
- Sierra Wireless, Inc. 1-6 24
- 2 Installation and Setup 25
- Sierra Wireless, Inc. 2-2 26
- Getting started 29
- Basic modem personalization 30
- command, for 31
- AT&W 31
- command to check that 31
- Initial testing 32
- Sierra Wireless, Inc. 2-10 34
- Problem determination 36
- Sierra Wireless, Inc. 2-14 38
- Sierra Wireless, Inc. 2-18 42
- ENTER, the cursor returns 43
- Sierra Wireless, Inc. 2-20 44
- Basic communications 45
- Sierra Wireless, Inc. 2-22 46
- 3 CDPD Security Features 47
- Modem security management 48
- Sierra Wireless, Inc. 3-4 50
- 4 Broadcast and Multicast 51
- Operation 51
- Broadcast 52
- Multicast 52
- Multicast setup 53
- Sierra Wireless, Inc. 4-4 54
- 5 DART Supported Protocols 55
- Sierra Wireless, Inc. 5-2 56
- PN1197-00 Revision 1.0 5-3 57
- for UDP 59
- Sierra Wireless, Inc. 5-8 62
- How the UDP behaves 63
- Sample UDP server setups 65
- DART TCP capabilities 68
- Friends Only mode operation 68
- TCP communication 69
- Setup options 71
- *A (select server type) AT 71
- for TCP 72
- Sample TCP setups 73
- SLIP IP Address overview 78
- Class NEI SLIP Address 79
- provided it is not 81
- Telnet escape commands 84
- Sierra Wireless, Inc. 5-32 86
- 6 Device Attachment 87
- Sierra Wireless, Inc. 6-2 88
- Computer 88
- Terminal 88
- PN1197-00 Revision 1.0 6-3 89
- Sierra Wireless, Inc. 6-4 90
- 7 Vehicle Installation 91
- Considerations 91
- Proximity to other antennas 92
- PN1197-00 Revision 1.0 7-3 93
- Sierra Wireless, Inc. 7-4 94
- 8 Application Programming 95
- Application program structure 96
- Data transfer 97
- Modes of operation 97
- Error recovery 98
- &S0 (always active) 98
- Automatic registration 100
- Registration timer 101
- Manual registration 101
- Auto-Registration at power-on 101
- Data forwarding 102
- PN1197-00 Revision 1.0 8-9 103
- Sierra Wireless, Inc. 8-10 104
- Auto answer setup 105
- Flow control considerations 106
- PN1197-00 Revision 1.0 8-13 107
- PAD operating mode 108
- Data and control interface 109
- Binary data transfer 110
- Parity considerations 111
- PAD keep-alive considerations 112
- PN1197-00 Revision 1.0 8-19 113
- Command response options 114
- Echo option selection 115
- Baud considerations 116
- PN1197-00 Revision 1.0 8-23 117
- Modem dial directory 118
- Messages and response codes 119
- Sierra Wireless, Inc. 8-26 120
- A Limited Warranty and 121
- Sierra Wireless, Inc. A-28 122
- B Product Specifications 123
- Sierra Wireless, Inc. B-2 124
- C Charts and Diagrams 125
- Sierra Wireless, Inc. C-2 126
- D SLIP Setup Examples 127
- Sierra Wireless, Inc. D-2 128
- Windows 95 129
- Sierra Wireless, Inc. D-4 130
- E S-Registers 131
- Sierra Wireless, Inc. E-2 132
- Register definitions 133
- PN1197-00 Revision 1.0 E-5 135
- • Value Baud: 135
- • Stop Bits: 135
- • Data Bits: 135
- PN1197-00 Revision 1.0 E-9 139
- Sierra Wireless, Inc. E-10 140
- PN1197-00 Revision 1.0 E-11 141
- PN1197-00 Revision 1.0 E-13 143
- Sierra Wireless, Inc. E-14 144
- F DART AT Command Set 145
- A/ Repeat 146
- A Answer Online 146
- D (cont.) 147
- E Command Mode Echo 149
- F Online Mode Echo 149
- H Hang-up (close connection) 149
- I Identify 149
- Q Quiet Mode 150
- V Verbose Result Codes 151
- Z Soft Reset 152
- &C Set DCD Operation 153
- &D Set DTR Operation 153
- &S Set DSR Operation 155
- &W Save Active Profile 156
- \J Restrict Channel Selection 157
- \J (cont.) 158
- \M Manual Transmit Control 158
- \N Set Side Preference 158
- \Q Set Flow Control Operation 160
- \S Set Subscriber Identity 161
- \T Automatic Transmit Control 162
- *A Select Server Type 162
- *K TCP PAD Keep-Alive 164
- *L Set Listen Port 165
- *P Ping Remote Host 166
- *R Automatic SLIP Mode 166
- *T Telnet Keep- Alive 167
- Service provider commands 168
- PN1197-00 Revision 1.0 F-25 169
- ^F Force PIN Usage 171
- ^S Set DART SLIP Address 173
- -L Lock on a Specific Channel 174
- G Loading DART 200 177
- Firmware 177
- Sierra Wireless, Inc. G-2 178
- H Problem Sheet 179
- Sierra Wireless, Inc. H-2 180
- Glossary 181
- A (cont.) 193
- C (cont.) 195
- M (cont.) 198
- S (cont.) 199
- T (cont.) 200
- W, X, Y, Z 201
- PN1197-00 Revision 1.0 203
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