Velocity Edge GX440 Guide de l'utilisateur Page 127
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- Table des matières
- MARQUE LIVRES
Noté. / 5. Basé sur avis des utilisateurs
GPS Configuration
Rev 2.3 Feb.12 127
Reliability Modes
Reliability Modes provide methods for the AirLink device to receive an
acknowledgement from the Reports Server to determine if a sent message was
received.
• Reliable Mode - The AirLink device will transmit a sequence number
(1 to 127) as part of a packet of messages that may contain one or more
reports. To reduce overhead, the server only acknowledges receipt after
every eighth packet. The AirLink device considers the eight packets a
“window” of outstanding packets.
If the AirLink device doesn’t receive acknowledgement for a “window”, the
device will PING the server with a message containing the sequence numbers
of the first and last packets that haven’t been acknowledged. The AirLink
device will continue until the server acknowledges receipt. When the AirLink
device receives the acknowledgement, it will advance its “window” to the next
group. When the AirLink device is first powered on (or reset), it will send a Set
Window message to sync up with the server for the current “window”.
On the other side, if the server receives an out of sequence packet, it will send
a message to the device noting the missing sequence and the AirLink device
will retransmit.
• Simple Reliable Mode - The AirLink device will ‘give up’ after a configured
number, *PPMAXRETRIES, of attempts and discard messages that cannot
be transmitted or received after that number of tries.
The acknowledgement message is the ASCII string “UDPACK” followed by the
sequence number.
• UDP Sequence Reliable - A sequence number is prepended to the report
packet in a range of 0x30 to 0x7f inclusive. The sequence number is ASCII
readable, allowing test tools to acknowledge the packets.
The acknowledgement message is the ASCII string “SEQACK” followed by
the sequence number.
The sequence number is not stored and will be reinitialized to 0x30 when the
AirLink device is reset or power cycled. If a message packet is not acknowl-
edged within the specified number of retries, the packet and its contents will
be dropped.
•TCP - The same as UDP Unreliable but using TCP instead of UDP.
• TCP Listen Reliable - TCP Listen Reliable is the same as UDP Sequence
Reliable except the Reports Server must initiate the connection using TCP
before the AirLink device will send reports. This allows servers to by-pass
some firewalls.
- ALEOS 4.2.3 Configuration 1
- User Guide 1
- Trademarks AirCard 4
- Contact 4
- Information 4
- Revision 5
- 6 20080616 6
- Rev 2.3 Feb.12 8 8
- Rev 2.3 Feb.12 9 9
- ALEOS 4.2.3 User Guide 10
- 10 20080616 10
- Contents 11
- Rev 2.3 Feb.12 11 11
- 12 20080616 12
- Rev 2.3 Feb.12 13 13
- 14 20080616 14
- 1: Introduction 15
- 16 20080616 16
- Tools and Reference Documents 17
- 18 20080616 18
- Main Menu Tabs 20
- Configuring 20
- Operation Modes 20
- Telnet/SSH Mode 22
- Creating a Template 23
- Applying a Template 24
- 26 20080616 26
- 3: Status 27
- 28 20080616 28
- WAN/Cellular 29
- 30 20080616 30
- Rev 2.3 Feb.12 31 31
- 32 20080616 32
- Rev 2.3 Feb.12 33 33
- VPN connection has been made 33
- Security 34
- Services 35
- 36 20080616 36
- Applications 38
- Rev 2.3 Feb.12 39 39
- 40 20080616 40
- 4: WAN/Cellular Configuration 41
- 42 20080616 42
- Keepalive 47
- Data Usage Using Keepalive 47
- Re-Activation 48
- 5: LAN Configuration 49
- DHCP/Addressing 50
- LAN Configuration 51
- Rev 2.3 Feb.12 51 51
- Internal DHCP Server 52
- Ethernet 53
- Virtual Ethernet 57
- Virtual Serial 59
- Host Port Routing 62
- Global DNS 63
- 66 20080616 66
- 68 20080616 68
- 6: VPN Configuration 69
- Split Tunnel 70
- VPN Configuration 75
- Rev 2.3 Feb.12 75 75
- SSL Tunnel 76
- Rev 2.3 Feb.12 77 77
- L2TP+IPsec 78
- VPN 2 to VPN 5 82
- 7: Security Configuration 83
- Port Forwarding and DMZ 84
- Port Filtering - Inbound 86
- Port Filtering - Outbound 87
- Trusted IPs - Outbound 89
- MAC Filtering 90
- Packet Inspection 91
- 92 20080616 92
- 8: Services Configuration 93
- ACEmanager 94
- 96 20080616 96
- Configuring Engine Hours 98
- Dynamic DNS 99
- Third Party Services 100
- IP Manager 101
- Understanding Domain Names 102
- Dynamic Names 103
- Control Only 105
- 106 20080616 106
- Gateway Only 107
- Control and Gateway 108
- Trusted Phone Number 111
- Telnet/SSH 112
- Email (SMTP) 113
- Management (SNMP) 114
- Services Configuration 115
- Rev 2.3 Feb.12 115 115
- 116 20080616 116
- • SNMP is disabled 116
- • 65535 116
- Time (SNTP) 117
- 118 20080616 118
- 9: GPS Configuration 119
- Remote Access Protocol (RAP) 120
- Before Configuring GPS 121
- Server 1 122
- Redundant Server 125
- Server 2 to Server 4 126
- Reliability Modes 127
- Local/Streaming 128
- Global Settings 130
- 132 20080616 132
- Introduction 133
- Configuration Overview 135
- Action Description 137
- 138 20080616 138
- Email/SMS 140
- Report Groups 141
- Configure Events 143
- 144 20080616 144
- 11: Serial Configuration 145
- 146 20080616 146
- MODBUS Address List 151
- 152 20080616 152
- 12: Application Configuration 153
- 154 20080616 154
- 13: I/O Configuration 161
- Pulse Count 162
- 14: Admin 163
- Advanced 164
- Radio Passthru 165
- A: Modbus/BSAP Configuration 169
- Modbus TCP/IP 170
- Modbus on UDP 170
- Host for Modbus on UDP 171
- Modbus with UDP 172
- 174 20080616 174
- B: PPP over Ethernet (PPPoE) 175
- Figure B-10: PPPoE Connection 179
- 180 20080616 180
- Figure B-14: PPPoE Connection 181
- 182 20080616 182
- Protocol 183
- SYNTAX DisplayString 188
- 204 20080616 204
- GPS Overview 205
- Configuring the Datum 208
- Over-The-Air (Remote) Host 208
- Local Host 209
- TCP GPS Report Polling 209
- Report Types 209
- Sending Reports Automatically 210
- Store and Forward 210
- RAP Configuration 212
- Device ID 213
- Odometer Data in Reports 213
- I/O Event Reports 214
- NMEA Configuration 215
- Streaming Messages (Local) 216
- TAIP Emulation Configuration 217
- Local Connection 218
- 220 20080616 220
- E: AT Commands 221
- CDMA Info 223
- CPU Status 224
- ATS53=T192.168.100.23/12345 225
- ATS53=foo.earlink.com 225
- ATS53=192.168.100.23/12345 225
- ATS53=/12345 225
- Dynamic IP 232
- PPP/Ethernet 233
- PassThru 234
- Low Power 238
- Firewall 238
- Serial Port 244
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