PAD Inter-Character Timer | Sierra Wireless DART 300 specification

User’s Guide			AT Command Reference
Table 12-5: WS-Registers in CDPD Mode (continued)

Register	Description	Range	Default	Units

70	PAD Inter-Character Timer	0 – 255	0	0.1 s

The timer is reset whenever input is received from the host (DTE). On expiry of this timer the modem will terminate the packet and forward it to the network.

NOTE: If the setting is very low and manual typing is used to enter data, then access to the escape sequence (TIES) may be lost. See Section 6.6.3.2 for details.

	Value	Meaning
	0	Disabled (Default)
	1 – 255	Timeout in tenths of a second.

72	PAD Input Buffer Editing Enable		0,1	1

Enables / disables the PAD’s capability to perform local editing of CDPD Network bound data. If enabled, the PAD will remove one character from the PAD’s input buffer upon receipt of the character specified by +WS73 (PAD backspace character).

If both On-line Echo (+WS62) and this register are enabled, upon receipt of the backspace character (+WS73) the PAD will echo the following character sequence to the host (DTE): <backspace character> <SP (0x20)> <backspace character> where the backspace character is that defined in +WS73

Value	Meaning
0	Disabled
1	Enabled (Default)

73	PAD Input Buffer Backspace Character	0	– 255	8 <BS>
	Specifies the character to be used by the PAD as “backspace”
	if local editing is enabled (+WS72)
74	PAD Maximum Packet Length	1	– 1000	1000	Bytes

Sets the maximum length of the packet assembly buffer. When input reaches this length, the packet is terminated and forwarded to the CDPD network.

This feature can be used to control packet forwarding if the characteristics of the telemetry prevent both the forwarding character (+WS63) and inter-character timer (+WS70) mechanisms from being used.

This value is the data content exclusive of headers. UDP adds 28 bytes of header. TCP adds 40 bytes of header. Long packet buffers may be fragmented into smaller IP packets if required by network router limitations. If this happens, it is transparent to the user.

2110212 Rev 1.0

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Sierra Wireless DART 300 manual PAD Inter-Character Timer

Contents

Sierra Wireless Dart 300 Cdpd Modem 2110212 Rev November Patents Safety and HazardsImportant Notice Copyright Regulatory Information RSA Licensee Contact Information Dart 300 Modem User’s Guide 2110212 Rev Contents Introduction Feature Reference Cdpd Network Registration Protocols and Packet Assembly Features Transmission Control Protocol TCP Configuration and Use Intstallation References Installation ConsiderationsAT Commands and Status Registers 119 Specifications 123 Introduction How to ProceedAbout this Guide Focus List Document Structure Book 2 Feature ReferenceBook 3 Configuration and Use Introduction Dart 300 Modem User’s Guide About This Guide Dart 300 ChecklistBook 4 Installation Book 5 References Conventions Used in this Reference ReferencesCurrency Dart 300 / SB300 Dart Introduction Dart 300 Modem 2110212 Rev System Overview Typical System View Field Network Connection Client / Server Project StagesCentral Monitor Stage 1 Application Planning Stage 4 Rollout Stage 2 Bench Integration and TestingStage 3 Field Installation and Testing Service Activation Getting Started Antenna Power SupplySet-up Considerations Serial Cable User’s Guide Getting Started Cdpd ConfigurationConnections Cdpd Network Registration Verifying Network Registration Ping Obtaining a Ping from the Modem Modes Local DTE/DCE InterfaceModem Modes and States Conditions Command to Data StateStates Sessions Details Data to Command StateUser’s Guide Local DTE/DCE Interface Data Buffers Command BufferModem Buffers Speed Buffering Parameters AT Command Handling and DefaultsGeneral Notes Responses and Results Returned by the Modem Responses FramingFraming Characters Response Framing Echo Verbose Quiet For Commands without a ResponseResult Codes Result Framing No Response Echo Verbose Quiet Possible Result Codes For Commands with a ResponseRegisters Result Framing After Response Echo Verbose Quiet Fixed Rate Setting +IPR RS-232C Interface and Control SignalsInterface Settings Flow Control Data Terminal Ready DTR Control SignalsDTR Flow Control Request to Send RTS Ring Indicator RIData Set Ready DSR Clear to Send CTS Data Carrier Detect DCD DCD Product Features Friends Only Dial Directory Implementation User’s Guide Product Features Auto-dial on Start-up Sleep Mode Cdpd Sleep Logic Sleep To force re-registration now Using Ring Indicator RI with Host SleepLogic Deep Sleep UDP/TCP Cdpd Radio and Booster Support Upgradability OSI Model Protocols and Packet Assembly FeaturesCommunication Protocols and Stacks Dart 300 Internal Protocol Stacks Packet Service ModesUser Datagram Protocol UDP Answering UDP Server Sessions UDP Server FeaturesUser’s Guide Protocols and Packet Assembly Features UDP Server Receive Lock Disabling the UDP Server UDP Client Features Closing UDP Sessions Broadcast Configuration and UseUDP Broadcast and Multicast Multicast TCP Handshaking TCP Server FeaturesTransmission Control Protocol TCP Answering TCP Server Sessions Disabling the TCP Server TCP Client FeaturesClosing a TCP Session Point-to-Point Protocol PPP TCP and Sleep ModeSerial Line Interface Protocol Slip Forwarding a Packet Packet Assembly ManagementAssembling a Packet Local Echo Escaping Data State Time Dependent Escape Sequence Tdes Escape Character Important RelationshipsGuard Time Time Independent Escape Sequence Ties DTR Transition PAD Session TimeoutData and Telemetry Considerations TCP Remote Disconnect User’s Guide Protocols and Packet Assembly Features Feature Reference Dart 300 Modem 2110212 Rev Advanced Features Multiple Cdpd Accounts Channel Scanning Controlling Network RegistrationChannel Acquisition Spni Matching User’s Guide Advanced FeaturesSide Preference Assign a Channel Enable Spni Matching Spni Table ConfigurationDisable Spni Matching Determining Channel Acquisition Status Registration Active and Auto-register NEI Indices Determining Registration Status Automatic RegistrationManual Registration De-registration +WPNEILIST Monitoring the Network Connection LED IndicatorRadio Signal Monitors Registration Mode Registration Status Feature Reference Dart 300 Modem 2110212 Rev NEI and Channel Restrictions UDP/TCP ServiceConfiguration Checklist for UDP/TCP Service Configuration and Use Dart 300 Modem Registration and Sleep ModeService Options Escape Options Packet Assembly and Forwarding OptionsUser’s Guide UDP/TCP Service Server Sessions Using UDP/TCP ServiceSave Configuration Server Initialization Opening a UDP Server Session Using an Open UDP SessionUDP Server Sessions Receiving Data Closing UDP Server Sessions TCP Server SessionsTransmitting Data Opening a TCP Server Session Using an Open TCP Session No Carrier result Client SessionsClosing TCP Server Sessions UDP Client Connection By +WS198 TCP Client Connection Using a Client Session Closing a Client Session Cabling Sample UDP/TCP ConfigurationsCase 1 Semi-intelligent RTU DCE male Modem Configuration +IPR=9600 Case 2 Dumb MeterProtocol Considerations +WS212=0 Sample Configuration Meter Command Remarks +WPNEI= ip+WS179=0 +WS213=1 Using This Configuration Configuration and Use Dart 300 Modem 2110212 Rev SLIP/PPP Service Configuring Slip Service Configuration and Use Dart 300 Modem Receiving Using Slip ServiceTransmitting Escaping Data State Point to Point Protocol PPP Configuring PPP ServiceUsing DTR to Escape Closing a Slip Session User’s Guide SLIP/PPP Service Using PPP Service Closing a PPP Session User’s Guide SLIP/PPP Service Configuration and Use Dart 300 Modem 2110212 Rev Device Attachment Antenna Connection Connection Installation Dart 300 ModemWatt Class I Booster Operation Null-Modem Connection Serial ConnectorPin Signal Direction User’s Guide Device Attachment DCE host Cable LengthDCE modem Power Connection Installation Dart 300 Modem 2110212 Rev Temperature vs. Duty Cycle Installation ConsiderationsTemperature and Auto Shutdown Minutes Time Ambient Temperature C Wire Splicing AccessPower Supply Grounding User’s Guide Considerations MountingCrimp Terminals Installation Dart 300 Modem 2110212 Rev 1AT Commands in Cdpd Mode Command Description AT Commands and Status RegistersAT Command Set AT+++ Result Codes AT Commands in Cdpd Mode Command Description 0xC0References Dart 300 Modem Options User’s Guide AT Command ReferenceAT Commands in Cdpd Mode Description Options AT Commands in Cdpd Mode Sn=x Quiet Result Code Display OptionFraming of responses. See .3.3 for details Sn? AT Commands in Cdpd Mode Command Description AT & Commands in Cdpd Mode Description AT + Commands in Cdpd Mode Command Description +IPR=n AT + Commands in Cdpd Mode Command Description Change c.c.c.c to n.n.n.n? +WPSPNI= n,n,...n +WSn? Change c.c.c.c.q to n.n.n.n.p? Cdpd Status Registers Registers in Cdpd ModeS-Registers in Cdpd Mode Description Range Default Units Auto-answer Word DisabledOff PAD Packet Service DTE side stack WS-Registers in Cdpd ModeWS-Registers in Cdpd Mode Description Range Default Units Logic Sleep References Dart 300 Modem PAD Inter-Character Timer 174 175 User’s Guide AT Command Reference 210 201209 216 217 Important Notes and Dependencies +WS197, also setting +WS176=+WS197Result Codes in Cdpd Mode Verbose Meaning Result Codes Stored Profile Settings for Cdpd Mode References Dart 300 Modem 2110212 Rev Problem Description Suggestions TroubleshootingGeneral Communication Problems ReferencesDART 300 Modem General Modem ProblemsError # Warranty Registration Cdpd Network / Connectivity ProblemsWarranty User’s Guide Troubleshooting Obtaining Service Radio Specifications SpecificationsPower Specifications Power Connector Regulatory Approvals Antenna SpecificationsAntenna Specifications FCC User’s GuideSpecifications Environmental SpecificationsApplication Interface Specifications Environmental Specifications