ISU AT Command Reference

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ISU AT Command ReferenceIntroductionCICell IdentifierCTS(V.24 Signal) Clear To Send. This signal is normally used in controlling the flow of data to the ISU.(See RTS)DCD(V.24 Signal) Data Carrier Detect. This is a signal from the ISU that indicates that it is connected tothe far-end modem for data transfer.DCEData Communications Equipment, i.e., a data adaptor or modem. In this product, DCE refers to theISU.DSR(V.24 Signal) Data Set Ready. This signal, from the ISU, indicates the readiness of the phone toreceive data.DTEData Terminal Equipment, such as a dumb terminal, or a PC running communications software.DTR(V.24 Signal) Data Terminal Ready. A signal from the DTE to the ISU. Can be used to terminatecalls.ESSETC SBD Subsystem (synonymous with GSS)ETCEarth Terminal ControllerETSIEuropean Telecommunications Standards Institute.FAField ApplicationGSMGlobal System for Mobile communications.GSSGateway SBD Subsystem (synonymous with ESS)IRLPIridium Radio Link ProtocolISUIndividual Subscriber UnitLACLocation Area CodeModemMOdulator/DEModulator. A device used to convert digital signals to analog signals for transmissionand reception of telephone lines.MOMobile Originated (for Short Burst Data)Version 2.6March 30, 2006 2
ISU AT Command ReferenceIntroductionMOMSNMobile Originated Message Sequence Number (for Short Burst Data)MTMobile Terminated (for Short Burst Data)MTMSNMobile Terminated Message Sequence Number (for Short Burst Data)RI(V.24 Signal) Ring Indicate. This is a signal from the ISU which indicates that an incoming call isringing or that an MT SBD message is present at the ESS.RPRelay Protocol (used in SMS).RTS(V.24 Signal) Request To Send. This signal is normally used in controlling the flow of data from theISU.SBDShort Burst DataSMSSMS Short Message Service.SMSSCShort Message Service - Service Centre (used in SMS).TPTransfer Protocol (used in SMS).XON/XOFFA standard method of controlling the flow of data to and from a ISU to prevent overflow/overrunconditions.Version 2.6March 30, 2006 3
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