Furuno IB-681 manual

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	SPECIFICATIONS OF HSD MODEM UNIT
		IB-681
1. GENERAL
(1)	Tx Frequency	179.8 MHz
(2)	Rx Frequency	90.0 MHz
(3)	Channel Frequency Spacing 100 kHz
(4)	Receive Level	-60 dBm to -90 dBm
(5)	Transmit Level	-12.5 dBm
(6)	Channel Rate	132 Kbps
(7)	Modulation	O-QPSK, 50% filtered
(8)	Data Speed	56/64 Kbps, synchronous
(9)	Interface	RS-232C (Dsub25p), RS-449 (Dsub37p)
2. POWER SOURCE
(1) Rated Power		100/220 VAC (±10%): 0.3/0.2 A, 1 Phase, 50/60 Hz
3. ENVIRONMENTAL CONDITION
(1)	Temperature	-15 °C to +55 °C
(2)	Relative Humidity	93% at +40 °C
(3)	Water Resistance	IPX2
4. COATING COLOR
(1)	Cover	2.5GY5/1.5 Newtone No.5
(2)	Panel	N3.0

SP - 1

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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 FeaturesComplete Set Installation Materials CP16-01601Installation Materials CP16-01602 Equipment ListInstallation Materials CP16-01605 Installation Materials CP16-01603Optional Equipment IB-681 System ConfigurationIB-181 IB-281Control Description OverviewFront panel IB-681, rear view Rear panelData rate SettingsSwitch Panel Settings DIP switchesSW2 Terminal interface Terminal Unit Settings OID/DID and IMN SettingsConfirming subscriber number Registering, Deleting Subscriber NumberRegistering subscriber number Deleting subscriber numberCalling OperationAutomatic HSD call Tone Name Frequency Manual callInterval Receiving Automatic call mode and receiving operationSW1 State Remarks SW3 State Remarks V.25bis Command, IndicationReceiving and automatic data rate switching Command Name DescriptionIndication 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 sequenceResetting the circuit breaker Maintenance & TroubleshootingMaintenance CleaningCalling Troubleshooting for the UserThen GeneralMounting location InstallationMounting procedure MountingWiring between HSD modem and router WiringRS-449 Interface Modifying the RF Conv board in the communication unitCPU2 Board 16P0133 Antenna cable Position of R135 LengthJ10 RF Conv BoardRF Conv Board CPU2 Board R135Mounting of connector assy Sub 9 pin Rear Panel BoardGround Wiring between HSD modem and communication unitJ11 Communication with other makes of Inmarsat-B terminals Circuit delayPropagation delay Router setting for network connectionNetwork configuration Syuchronous -asynchronous adapter Land Earth Station IOR Etilat IB-681 Page Page Page Index

IB-681

1. GENERAL