Furuno IB-681 manual Operation, Calling, Automatic HSD call

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3. OPERATION

3.1 Calling

An HSD call may be made automatically or manually.

3.1.1 Automatic HSD call

All automatic HSD calls are carried and terminated from the HSD terminal. Automatic HSD calls begin when the DTE raises the DTR line in the serial connector. The Inmarsat terminal dials the pre-programmed number. Upon answer by the called system the HSD port is enabled and data transfer can take place.

Automatic HSD calls fall into two categories: direct call and address call. The category

may be selected with DIP switch SW1: turn off the switch (default setting) for direct call; turn on the switch for address call. See page 3 for DIP switch setting.

Direct call setup

•Program subscriber number. See page 5.

•Turn off DIP switch SW1.

The subscriber is called when the HSD terminal turns on the DTR signal.

Address call setup

•See page 13 for sequence.

•Turn on DIP switch SW1.

The HSD terminal must support address calls. The HSD terminal outputs the following command to the HSD modem in the format set by DIP switch SW4 and SW5:

CRN x x x x x (V.25bis command; x x x x x = subscriber number)

For further details about the CRN command, see page 10.

Note : If personal computer cannot call by user’s application having V.25 bis terminal interface, call by DTR dailing (Direct call).

Clearing automatic HSD call

An automatic HSD call is cleared when the DTR signal is received from the HSD termi- nal.

The HSD terminal turns off DTR, then the automatic call is cleared.

HSD terminal sends clear signal to CES, then the HSD modem turns off DCD and CTS. Finally, the HSD modem turns off DSR.

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Contents Page B . N o . O M E 5 6 0 9 Safety Information for the Operator Safety InstructionsElectrical Shock Hazard Safety Information for the InstallerTable of Contents Declaration of conformity to type Appendix Usage TipsIntroduction FeaturesInstallation Materials CP16-01602 Installation Materials CP16-01601Equipment List Complete SetOptional Equipment Installation Materials CP16-01603Installation Materials CP16-01605 IB-181 System ConfigurationIB-281 IB-681Front panel OverviewControl Description IB-681, rear view Rear panelSwitch Panel Settings SettingsDIP switches Data rateSW2 Terminal interface Terminal Unit Settings OID/DID and IMN SettingsRegistering subscriber number Registering, Deleting Subscriber NumberDeleting subscriber number Confirming subscriber numberAutomatic HSD call OperationCalling Interval Manual callTone Name Frequency SW1 State Remarks Automatic call mode and receiving operationReceiving Receiving and automatic data rate switching V.25bis Command, IndicationCommand Name Description SW3 State RemarksIndication Description Command DescriptionCall Sequence Direct call setup sequenceAddress call setup sequence Address call setup sequenceManual call setup sequence Manual call setup sequenceCall clear sequence from land Automatic call clear sequenceManual call clear sequence Manual call clear sequenceMaintenance Maintenance & TroubleshootingCleaning Resetting the circuit breakerThen Troubleshooting for the UserGeneral CallingMounting procedure InstallationMounting Mounting locationWiring between HSD modem and router WiringRS-449 Interface Modifying the RF Conv board in the communication unitCPU2 Board 16P0133 Antenna cable Position of R135 LengthRF Conv Board CPU2 Board RF Conv BoardR135 J10Mounting of connector assy Sub 9 pin Rear Panel BoardJ11 Wiring between HSD modem and communication unitGround Propagation delay Circuit delayRouter setting for network connection Communication with other makes of Inmarsat-B terminalsNetwork configuration Syuchronous -asynchronous adapter Land Earth Station IOR Etilat IB-681 Page Page Page Index