Only qualified personnel
should work inside the
equipment.
Immediately turn off the power at the
switchboard if water leaks into the
equipment or something is dropped in
the equipment.
Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.
Do not disassemble or modify the
equipment.
Fire, electrical shock or serious injury can
result.
iiiiiiiiiiiii
i
Page 4
Safety Information for the Installer
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment
unless totally familiar with
electrical circuits and
service manual.
Only qualified personnel
should work inside the
equipment.
Turn off the power at the switchboard
before beginning the installation.
Fire or electrical shock can result if the
power is left on.
Do not install the equipment where it
may get wet from rain or water splash.
Water in the equipment can result in fire,
electrical shock or equipment damage.
CAUTION
Ground the equipment to
prevent electrical shock and
mutual interference.
Observe the following compass safe
distances to prevent deviation of a
magnetic compass:
Standard Steering
Compass Compass
HSD
Modem
1.2 m 0.9 m
Be sure that the power supply is
compatible with the voltage rating of
the equipment.
Connection of an incorrect power supply
can cause fire or equipment damage. The
voltage rating of the equipment appears
on the label above the power connector.
FURUNO Electric Company thanks you for selecting the IB-681 High Speed Data (HSD)
Modem. We are confident you will discover why FURUNO has become synonymous with
quality and reliability.
For over 50 years FURUNO Electric Company has enjoyed an enviable reputation for
excellent marine electronics equipment. This dedication to excellence is furthered by our
extensive global network of agents and dealers.
The IB-681 is designed and constructed to meet the rigorous demands of the marine
environment. However, no machine can perform its intended function unless properly installed and maintained. Please carefully read and follow the recommended procedures for
installation, operation and maintenance to get maximum performance from this equipment.
Features
The IB-681 provides global, satellite-based high speed duplex 56 or 64 Kbps data via
ISDN. High speed data services will be useful to companies and organizations with large
amounts of data to transmit.
• Automatic, manual calling
• LEDs show equipment status
• Simple operation
• DIP switches and data rate switch set operation parameters
Notice
FURUNO will assume no responsibility
for security-related problems.
Network configuration depends on
application, number of terminals used,
shipboard network and land network.
Generally, setup is done on the user’s
equipment. For details on network setup
contact the network manager.
POWER switch: T urns the power on/off. Flip up to turn the power on; flip down to turn the
power off. After turning on the power, all status LEDs light for about 20 seconds. Then all
LEDs except POWER go off about 10 seconds later. Turn on the IB-281 about 30 seconds after turning on the IB-681, otherwise the IB-281 may display “HSD Fault.” If the FAIL
lamp on the IB-281 goes off then operation is normal.
DIMMER control: Adjusts the illumination of the status LEDs.
Switch panel: Contains eight DIP switches and the Data Rate switch which set operation
parameters. See page 3 for details.
Status LEDs: Show equipment status.
POWER: Lights when the power is turned on.
SYNC:Lights, during HSD communications, when satellite signal becomes synchro-
nized.
TX (64K): Lights when data rate is 64 Kbps.
TX (56K): Lights when data rate is 56 Kbps.
FAIL:Lights for communication error.
Note: TX LED on IB-281 dose not light during HSD communications.
1
Page 12
1.1.2 Rear panel
HSD DATA 2
HSD DATA 1
HSD DATA1HSD DATA2
TX IF RX IF
TX IF
REF
REF
RX IF
HSD CTRL
AC100-220V
100-220 VAC
HSD CTRL
BREAKER
Earth terminal
Breaker (1A)
Figure 2 IB-681, rear view
HSD DATA 1: RS-232 interface connector
HSD DATA 2: RS-449 interface connector
HSD CTRL: Conducts control data communications between communication unit and
HSD modem.
Breaker: The red button pops out when overcurrent flows inside the equipment. In this
case, find the cause of the overcurrent and push the button.
100-220 VAC: Connection of 100/220 VAC power.
REF: Receives reference signal from the communication unit.
RX IF: Receives IF signal from the communication unit.
TX IF: Sends IF signal to the communication unit.
2
Page 13
2. SETTINGS
2.1 Switch Panel Settings
Communication parameters are set with the switches in the switch panel. Unfasten two
screws to access the switches. Note that it is not necessary to turn off the IB-681 to
access the switches.
1 2 3 4
ON
5 6 7 8
Data Rate
64K
56K
: Factory setting
Figure 3 Switch panel
2.1.1 Data rate
Set the data rate according to land line/network. The default setting is 64k (64 Kbps). 56k
is for USA ISDN circuit, for example. Data rate cannot be change after connecting with a
subscriber.
OFF: Call starts with reception of DTR signal from HSD terminal.
ON: Call starts when subscriber number from the HSD terminal is loaded on the TxD line.
3
Page 14
SW2: Terminal interface
g
g
y
y
Interface with HSD terminal.
OFF: RS-449 (D-SUB 37 pin connector).
ON: RS-232 (D-SUB 25 pin connector).
SW3: Automatic data rate switching
Determines whether to receive data at data rate other than what is set with the Data Rate
switch in the switch panel.
OFF: Prevents reception of data received at data rate other than which is set with the data
rate switch.
ON: Enables reception of data received at data rate other than which is set with the data
rate switch.
SW4: Command format
Sets command format to the HSD modem, and is only effective when SW1 is set for
address call (ON). Set according to specification of HSD terminal.
Sets character format to the HSD modem, and is only effective when SW1 is set for address call (ON). Set according to specification of HSD terminal.
OFF: 8 bit, no parity
ON: 7 bit, even, odd parity
4
Page 15
2.2 OID/DID and IMN Settings
OID/DID and IMN are set on the communication unit, usually at the time of installation.
The telephone for HSD calling is alos set by the installing technician. For more information, contact a FURUNO dealer or agent.
2.3 Terminal Unit Settings
“9: HSD” is added to the Terminal Setup menu on the terminal unit. Additionally, the HSD
is provided with the lock switch function, which you may set it as shown below.
Press [2], [Enter].
[Terminal setup]
1: Tel No.1 7: Data
2: Tel No.2 8: Telex
3: Tel No.3 9: HSD
4: Tel No.4
5: Tel No.5
6: Tel No.6
E: Exit
Enter JOB No. 9
Press [9], [2].
[HSD]
Key Lock: Ignore/Valid
Ignore: Lock switch setting ignored;
receive capability.
Valid:Lock switch setting followed;
cannot transmit when lock
switch is in "disable" position.
Figure 4 Terminal setup menu
5
Page 16
2.4 Registering, Deleting Subscriber Number
2.4.1 Registering subscriber number
Register subscriber number as follows with the No.1 telephone. The subscriber number
may contain 20 digits (*, # cannot be registered). The number can be confirmed by printing
the status display.
1. Pick up the handset of the No.1 telephone and confirm dial tone.
2. Dial subscriber’s no. as follows:
* 5 1 * a a a 0 0 b b x x x x x x x x x #
Subscriber’s Number
3. Confirm dial tone (See table 2).
2.4.2 Deleting subscriber number
Country Code
Automatic Dialing
Land Earth Station (LES)
Prefix (64k) for HSD call
1. Dial * 5 1 * #.
2.4.3 Confirming subscriber number
HSD communications settings (HSD settings input to the communcation unit) are contained on the status monitor which can be printed from the No.1 telephone.
1. Pick up the handset of the No. 1 telephone.
2. Dial * 9 6 # to print the status monitor.
.
.
.
Prefix Code:
HSD Destination: XXXXXXXXXXXXXXX
2.4.4 Status display on the terminal unit
The status display shows HSD state. You can print it from the terminal unit. Sample HSD
status indications are as below.
RX Signal Level (HSD) ...
RX IF AGC Level (HSD) ...
2nd Local (HSD) ...
6
Page 17
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 terminal.
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.
7
Page 18
3.1.2 Manual call
Manual calls are made with a telephone (designated at installation) connected to the communication unit. The HSD terminal must support manual calls.
To make a manual call, turn off DIP switch SW1, and then dial subscriber number as
follows:
* 5 5 *
or
* 5 6 * a a a 0 0 b b x x x x x x x x x #
Subscriber’s Number
Country Code
Upon answer by the called system the HSD port is enabled and data transfer can take
place. After the number is dialed listen for progress tone to confirm call. See the table
below. When you hear the “HSD call successful” tone hang up the handset.
Automatic Dialing
Land Earth Station (LES)
Prefix for HSD Call
55: 56 Kbps
56: 64 Kpbs
Clearing manual call
Dial * 5 9 #.
Table 2 Progress tones
emaNenoTycneuqerF
lufsseccusllacDSHzH006ces5.0,ces1
eruliafllacDSHzH524ces5.0,ces5.0
llacDSHlaunaM
.ondellac/deraelc
detpecca
llacDSHlaunaM
.ondellac/deraelc
detpeccaton
zH524ces5.0,ces1
zH524ces5.0,ces5.0
FFO,NO
lavretnI
8
Page 19
3.2 Receiving
Certain HSD terminals cannot receive the RI signal and therefore cannot receive.
3.2.1 Automatic call mode and receiving operation
Receiving processing depends on the setting of DIP switch SW1 as follows:
When a call arrives, the HSD modem turns RI ON and then acknowledges reception by
sending INC to the HSD terminal. (See page 10.) Five seconds after sending INC receiving processing is initiated. When processing is completed, RI goes OFF and DSR, CTS,
DCD go ON to communicate over land line.
If the HSD terminal sends the DIC command to the HSD modem, the HSD modem does
not initiate receiving processing. This happens in the following instances:
• Processing initiated within five seconds after INC is received
If this occurs while the call is being relayed, the CIC command is sent and the HSD modem reinitiates processing.
Address call and DTR OFF
When a call arrives, the HSD modem turns RI ON. This tells the HSD terminal to turn on
the DTR signal, which causes the HSD modem to send the INC (indication) signal to the
HSD terminal to indicate it is receiving. The HSD terminal then sends the CIC command to
the HSD modem which initiates receiving processing. When processing is completed, RI
goes OFF and DSR, CTS, DCD go ON to communicate over land line.
When DIC is sent by the HSD terminal instead of CIC, the HSD modem sends the indication V AL. In this case processing is not started. Furthermore, when the CRN command or
other three-character command is sent the HSD modem sends the indication INV.
9
Page 20
3.2.2 Receiving and automatic data rate switching
A call arrives at the data rate set on a subscriber’s equipment, and the setting of DIP
Switch SW3 determines if the call will be received or not when the data rate is different
from that set on the IB-681.
For automatic calling, the HSD terminal directs the HSD modem with commands. Additionally the HSD modem directs the HSD terminal with indications. These commands and
indications are as below.
Commands
dnammoCemaNnoitpircseD
⋅⋅
xxNRC
CIDllaCgnimocnIelbasiD.ylpercitamotuastneverP
CICllaCgnimocnItcennoC.ylpercitamotuaswollA
Consecutive commands cannot be accepted. Commands use IA5 characters. Upper case
or lower case may be input, but case cannot be mixed.
An automatic call is cleared when the DTR signal is received from the HSD terminal.
The HSD terminal turns off DTR, then the automatic call is cleared.
The HSD terminal sends clear signal to CES, then HSD modem turns off DCD and
CTS. Finally HSD modem turns off DSR.
CES NCS FELCOM
DTR OFF
Ch. release SU
10 times
Disconnect
HSUB
DCD CTS OFF
CESI
Ch. release SU
DSR OFF
Figure 8 Automatic call clear sequence
3.4.5 Call clear sequence from land
Land clears automatic call, then CES sends clear signal. The HSD modem turns off DCD
and CTS. Finally, the HSD modem turns off DSR, and the HSD terminal turns off DTR.
CES NCS FELCOM
Disconnect
from land
Max. 2 min
delay
Ch. release SU
HSUB
Ch. release SU
CESI
Ch. release SU
10 times
HSUB
DCD CTS OFF
DSR OFF
DTR OFF
Figure 9 Call clear sequence from land
15
Page 26
3.4.6 Manual call clear sequence
CES NCS FELCOM
Disconnect
HSUB
OFF HOOK
Ch. release SU
10 times
DCD CTS OFF
Ch. release SU
Figure 10 Manual call clear sequence
CESI
DSR OFF
DTR OFF
16
Page 27
4. MAINTENANCE & TROUBLESHOOTING
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment
unless totally familiar with
electrical circuits and
service manual.
Only qualified personnel
should work inside the
equipment.
4.1 Maintenance
4.1.1 Cleaning
Dust or dirt on the equipment may be removed with a soft, dry cloth. Do not use commercial or chemical cleaners to clean the unit; they can remove paint and markings.
4.1.2 Resetting the circuit breaker
The BREAKER button on the rear panel pops out when the voltage input to the equipment
exceeds the voltage rating. In this case, reset the power and press the button to restore
normal operation.
4.2 Self Test at Terminal Unit
1. At the standby display, press [F4], [6], [5] and [Enter] to display program nos. of devices. If the IB-681 is powered off or is not connected, *CONNECT ERROR* appears
in the HSD MODEM field.
Do not open the equipment
unless totally familiar with
electrical circuits and
service manual.
Only qualified personnel
should work inside the
equipment.
The mounting location should satisfy the following requirements:
• The mounting location should be clean, moderate in temperature and humidity and well
ventilated.
• Be sure to leave sufficient space around the unit for maintenance and checking.
• A magnetic compass will be affected if placed to close to the IB-681. Observe the fol-
lowing compass safe distances to prevent deviation of a magnetic compass: Standard
compass, 1.2 m, Steering compass, 0.9 m.
• Keep the unit out of direct sunlight because of heat that can build up inside the cabinet.
5.1.2 Mounting procedure
The unit can be mounted on a tabletop. Fix the unit to the chosen location with 6x20
tapping screws (supplied). For added support, used M6 bolts (local supply) instead of the
tapping screws.
Note: Do not place the unit atop the terminal unit of the FELCOM 81.
19
Page 30
5.2 Wiring
5.2.1 Wiring between HSD modem and router
A serial straight cable with a 25 pin connector (RS-232 interface) or 37 pin connector (RS449 interface) connects between the IB-681 and HSD terminal (ex. Router) as shown
below. The interface to use is selected with DIP switch SW2. For the RS-232 interface, the
length of the cable must not exceed 15 meters. If a longer cable is required use the RS449 interface instead. Only one HSD Terminal (Router) can be connected.
HSD DATA 1
HSD
To comm. unit
MODEM
IB-680
HSD DATA 2
Figure 13 Connection of HSD modem and HSD terminal
Pin nos. 1, 9-14, 16, 18-19, 21, 23-25 are not used.
Figure 14 RS-232 Interface
Note: The HSD modem uses synchronous serial communication, therefore the HSD terminal (PC, etc.) cannot be directly connected unless it has a synchronous serial port.
Pin nos. 1-3, 10, 14, 16-18, 20-21, 28, 32-37 are not used.
Figure 15 RS-449 Interface
Fabrication of plug case assy.
Aluminum tape
Fold back braided shield
onto cable; tape shield
as shown.
Cable Clamp
Cable
←
→
→
←
→
→
→
←
→
→
Figure 16 Fabrication of plug case (same procedure for 25 pin, 37 pin)
5.2.2 Modifying the RF CONV board in the communication unit
1. Turn off the communication unit.
2. Detach the cover.
3. Replace the RF CONV Board as follows if it is version -4 or below.
a) Unfasten the coaxial connector nut.
b) Unplug all connectors from the RF CONV Board.
c) Dismount the RF CONV Board.
d) Mount the new RF CONV Board, plug in connectors to the board, and fasten the
coaxial connector nut.
e) For the new RF CONV Board, set R135 according to antenna cable length as shown
in the table below. See Figure 19 for the location of R135.
21
Page 32
elbacannetnA
htgnel
531RfonoitisoP
m04ot01)noitisoptluafed(noitisopdekraM
m04nahteroM)rewoptuptuo.xam(esiwkcolcylluF
4. Remove the CPU2 Board from the communication unit. See Figure 19 for location.
5. Replace the ROMs (I/O CPU and SYS CPU) on the CPU2 Board. See Figure 17 for
location. Mount the CPU2 Board.
CPU2 BOARD 16P0133
U65
SYS CPU
16501-05-110
I/O CPU
16501-06-106
U67
JP2
DIP SW S1
U55
U56
U37
U5
U8
BT1
C75
Figure 17 CPU2 Board
22
Page 33
6. Version -1 of the CPU 2 Board, solder a harness of cable assy. (supplied) to the loca-
tion shown in the illustration below. Connect other side of cable assy. to J10 on the RF
CONV board.
CPU2 BOARD 16P0133
U65
U5
U67
DIP SW S1
GND
HSD ON
U37
U8
7
BT1
JP2
U55
12
Part side
U56
C75
CPU2 Board
U567
U55
12
PH5P
4
1
RF CONV Board
J10
1
2
Cable assy.
Figure 18 CPU 2 Board Version 1
7. For version -2 and after of the CPU2 Board, connect the cable assy. (supplied) between
J7 on the CPU2 Board and J10 on the RF CONV Board.
CPU2 Board
Cable assy.
RF CONV BoardCPU2 Board
J10 (PH2P) J7 (PH5P)
1 GND1 P20 (HSD ON)
2 HSD ON2 P213 P23
4 GND
5
Marked
point
POWER
POWER
DIMMER
DIMMER
DIMMER
DIMMER
LOCK
LOCK
LOCK
LOCK
FELCOM 81
J7
INMARSAT-B
INMARSAT-B
MOBILE EARTH STATION
MOBILE EARTH STATION
COMPASS
COMPASS
BEARING
BEARING
ELEVATION
ELEVATION
AOR-WEST
AOR-WEST
S LEVEL
S LEVEL
AOR- EAST
AOR- EAST
POR
POR
TEL 1
TEL 1
I
I
OR
OR
TEL 2
TEL 2
TEL 3
TEL 3
READY
READY
TEL 4
TEL 4
TX
TX
TEL 5
TEL 5
FAIL
FAIL
TEL 6
TEL 6
TELEX
TELEX
DATA
DATA
R135
J10
RF CONV Board
Figure 19 Communication unit, cover removed, right side view
8. Replace the rear panel for the communication unit manufactured before 7/98.
23
Page 34
9. Detach all connectors from the rear panel; dismount the power supply unit and the rear
panel.
10.For the unit manufactured before 7/98, detach the dummy plate from the rear panel
and fasten the connector assy. (supplied) to the rear panel with the screws used to fix
the dummy plate. For the unit manufactured after 7/98 use the screws supplied to
attach the connector assy. to the rear panel.
Connector assy.
DGPS OUT
Rear panel of communication unit
TX IF
RX IF
Detach dummy
plate and fasten
connector fixing
plate with screws
REF
used to fasten
dummy plate.
HSD CTRL
Dummy plate
Figure 20 Mounting of connector assy.
11.For version -2 or higher of the REAR PANEL Board.
Connect the HSD CTRL connector from the connector assy. to J15 on the REAR
PANEL Board.
REAR PANEL Board,
front view
REAR PANEL
Board
J15
HSD CTRL
ConnectorRF CONV
assy.Board
HSD CTRL J15
1 NC
2 RD1 RD
3 TD2 TD
4 NC 3 GND
5 GND
6 - 9 NC
POWER
POWER
DIMMER
DIMMER
DIMMER
DIMMER
LOCK
LOCK
LOCK
LOCK
FELCOM 81
INMARSAT-B
INMARSAT-B
MOBILE EARTH STATION
MOBILE EARTH STATION
COMPASS
COMPASS
BEARING
BEARING
ELEVATION
ELEVATION
AOR-WEST
AOR-WEST
S LEVEL
S LEVEL
AOR- EAST
AOR- EAST
POR
POR
TEL 1
TEL 1
I
I
OR
OR
TEL 2
TEL 2
TEL 3
TEL 3
READY
READY
TEL 4
TEL 4
TX
TX
TEL 5
TEL 5
FAIL
FAIL
TEL 6
TEL 6
TELEX
TELEX
DATA
DATA
Figure 21 Communication unit, rear view, rear panel removed
24
Page 35
For version -1 of the REAR PANEL Board.
Detach the REAR PANEL Board. Solder the HSD CTRL connector to the following
points on the REAR PANEL Board.
5 GND
3 TD
REAR PANEL CONNECTOR ASSY.
2 RD
J2 (D-sub 9 pin)
32
2
31
3
39
5
RD
TD
GND
Figure 22 REAR PANEL Board
25
Page 36
12. Attach the rear panel and mount the power supply unit.
13.Connect the four plugs from the connector fixing plate to the RF CONV Board as shown
in Figure 23.
ConnectorRF CONV
assy.Board
POWER
POWER
DIMMER
DIMMER
DIMMER
DIMMER
LOCK
LOCK
LOCK
LOCK
FELCOM 81
INMARSAT-B
INMARSAT-B
MOBILE EARTH STATION
MOBILE EARTH STATION
COMPASS
COMPASS
BEARING
BEARING
ELEVATION
ELEVATION
AOR-WEST
AOR-WEST
S LEVEL
S LEVEL
AOR- EAST
AOR- EAST
POR
POR
TEL 1
TEL 1
I
I
OR
OR
TEL 2
TEL 2
TEL 3
TEL 3
READY
READY
TEL 4
TEL 4
TX
TX
TEL 5
TEL 5
FAIL
FAIL
TEL 6
TEL 6
TELEX
TELEX
DATA
DATA
J11
J9
J7
J8
RF CONV Board
TX IFJ9
RX IFJ7
REFJ8
(DGPS (J11)
OUT)
Figure 23 Communication unit, right side view
14. Attach the cover.
15. Plug in all connectors to the rear panel.
5.2.3 Wiring between HSD modem and communication unit
1. Connect the communication unit to the IB-681 with three coaxial cables (TX IF, RX IF,
REF connectors) and one serial cable with 9 pin connector (HSD CTRL connector).
Coaxial cable (Max. 5 m, BNC-P-55UX2)
TX IF
RX IF
REF
COMMUNICATION
UNIT IB-281
HSD CTRL
TX IF
RX IF
REF
HSD
MODEM
IB-681
16S0277
Ship’s
mains
HSD CTRL
Serial cable (Max. 5 m, 17JE-573-2 harness)
Figure 24 Connection of IB-681 and communication unit
5.2.4 Ground
Connect the copper strap (supplied) between
the earth terminal on the IB-681 and ship’s
superstructure.
CAUTION
Ground the equipment to
prevent electrical shock
and mutual interference.
26
Page 37
APPENDIX Usage Tips
HSD DATA 2
HSD
MODEM
IB-681
RS-449
Router
CISCO 1601
To comm. unit
10BASE-T
to LAN
Communication with other makes of Inmarsat-B terminals
HSD communications time may increase depending on communications content when
the HSD modem is used in a network. In this case, normal telephone and fax communications are disabled (except distress), thus frequency of communications and communications time must be carefully considered when drawing up communications plans. If
communications overlap one another, it may be necessary to install an additional MES.
Landline
Most landlines use ISDN circuits, and rules of operation vary with country. Thus several
ISDN terminals may be necessary.
Circuit delay
It takes about 15~20 sesconds for an HSD call to reach land terminal once the call is
initialed by an MES.
Propagation delay
A delay of about 15-20 seconds occurs on transmission of file from HSD terminal to
coast earth station.
A delay of 240 msec exists on the satellite circuit line between the MES and coast earth
station. A 100 msec delay occurs in Tx processing and Rx processing in the IB-681.
Furthermore, a propagation delay may occur on the landline between the land terminal
and coast earth station depending on the distance between them.
TCP/IP protocol
• When throughput is slow due to propagation delay , enlarge the size of the TCP window
to compensate for the delay . TCP size setting depends on protocol stack and OS. Consult respective operator’s manual for advice.
• When using a remote router , raising the communications cue (buffer) setting can speed
up throughput time. However , in some cases it may be necessary for the ship and land
terminals to have the same router. Some routers cannot be used for Inmarsat HSD
communications, especially those which cannot accommodate circuits which have large
propagation delay. Consult with router maker and dealer to determine suitable router.
• For further details consult the network manager.
Router setting for network connection
Example:
epyTrerutcafunaM
retuoR1061OCSICSMETSYSOCSIC
tfosSOI33.11C1061CFSSMETSYSOCSIC
elbaCTM944BACSMETSYSOCSIC
Figure 24Sample of connection
27
Page 38
Set subscriber number at the FELCOM *51* ...#
cisco1601#sh conf
version 11.3
service udp-small-servers
service tcp-small-servers
!
hostname cisco1601
!
enable password *****
!
username land-term password 0 *****
!
interface Ethernet0
ip address 192.168.2.1 255.255.255.0
!
interface Serial0
ip address 192.168.10.10 255.255.255.0
encapsulation ppp
no keepalive
dialer dtr
dialer-group 1
ppp authentication chap
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.10.1
ip route 192.168.0.0 255.255.255.0 192.168.10.1
ip route 192.168.1.0 255.255.255.0 192.168.10.1
dialer-list 1 protocol ip permit
snmp-server community public R0
!
line con 0
exec-timeout 0 0
line vty 0 4
password *****
login
!
end
cisco1601#
This example shows only the minimum necessary settings for confirmation. Further
details can be obtained from a Cisco dealer or Cisco’s home page (http://
www.cisco.com).
For other router see its operator’s manual.
Network configuration
• Network configuration depends on application and number of terminals used. Gener-
ally, setup is done on the user’s equipment.
• Setup depends on shipboard network and land network. For details contact the net-
work manager.
• We recommend that identification be exchanged between sender and receiver . Where
required used packet filtering and firewall.
• FURUNO will assume no responsibility for security-related problems.
28
Page 39
Syuchronous -asynchronous adapter
This section discusses some of the synchronous -asynchronous adapters currently available. Connecting a single PC as in the figures below you can connect to a subscriber
much easier than by using a Dial -up Router.
These devices have been tested by FURUNO.
KlasHopper PCMCIA400 (Klas Ltd., lreland)
PC
KlasHopper
HSD
modem
FELCOM81
PPP supported
Terminal
TA/Router
[Landline]
• Drive software required to use the equipment.
• PPP (Point-to- Protocol) supported. Therefore, KlasHopper is not required at receiving
end. You can connect to an internet service provider with an ordinary modem or terminal adapter.
• No limitations to software usage (Web Browser, E-mail, etc.)
RAMSAT RVH24(ODC-Caltronic A/S, Denmark)
PC
RAMSAT
HSD
modem
(Synchronous
FELCOM
Serial port)
81
TA
RAMSAT
Terminal
[Landline]
• No driver software required. However, modem data files are provided to permit the
RAMSAT to function as an external modem.
• RAMSAT required by both sender and receiver .
NOTE : RAMSAT may introduce a converter which supports PPP. Then, its
function may be similar to the KlasHopper.
• File transfer software which provides simultaneous transmission and reception of files
is optionally available. However this software has not been tested by FURUNO.
29
Page 40
Land Earth Station
INMARSAT-B LES
STATUS TO 31st August
1999
OCEAN
REGION
AOR-EAusguelFrance Telecom011BV. BF, BT, BD, BHSD
AOR-E
AOR-EBurumPTT Telecom012BV. BF, BT, BD, BHSD
AOR-EEikTelenor004BV. BF, BT, BD, BHSD
AOR-EFucinoTelecom Italia555BV. BF, BT, BD, BHSD
AOR-EGoonhillyBT002BV, BF, BT, BD, BHSD
AOR-E
AOR-EIndot at LaurentidesIndot007BV, BF, BT, BD, BHSD
AOR-EJeddahMinistry of PTT025BV, BF, BT, BD, pending RCC info
AOR-EKDD at BurumKDD003BV. BF, BT, BD, BHSD
LES NAMELES PROVIDER
Beijing Marine at
Southbury
Hong Kong at
Laurentides
Beijing Marine &
Navigation
HKT118BV. BF, BT, BD, BHSD
LES ACCESS
CODE
868BV. BF, BT, BD, BHSD
BV - B Voice; BF - B Fax; BT - B Telex,
BD - B Data; BHSD - B High Speed Data
STATUS
AOR-E
AOR-ELaurentidesStratos Mobile Networks013BV. BF, BT, BD, BHSD