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HF Email: Low cost email via
shortwave HF radio
SSB shortwave radio email systems offer a low
cost alternative to mobile and satellite phone systems and offers near global
coverage. Most SSB email service providers work on an annual subscription
basis, so there are no line-time or number of bits transfer charges as with
mobile phone or satellite systems. To use SSB Email you require an SSB radio such as the ICOM M710 or ICOM M801, a radio modem and a computer running Mircosoft Windows. Using SSB email is as easy as sending email via your telephone line or mobile phone. Setting up Pactor Modem with Icom M801EYou MUST configure the M801E before connecting a pactor modem to a Icom M801E.To do this you need to put the Icom M801E into 'Initial set mode', see page 43 of Icom M801E manual. Once in 'Initial set mode' make the follow changes:- Rotate [GRP] and select REMOTE IF, rotate [CH] and select NMEA. Rotate [GRP] and select ACC out, rotate [CH] and select ON. Switch Icom M801E OFF and then Back ON. The Icom M801E is now ready to except a pactor modem. Frequencies & licencingThe frequencies used, in the main, are within marine allocated frequency bands and hence your ship's radio licence covers you for transmitting on these frequencies. Some USA stations do use private frequencies which may not be covered by your ships radio licence and you may find that your marine SSB transceiver will not transmit on some of the privately used frequencies.SailCom Marine can re-program the ICOM M710 or ICOM M801E to work on these frequencies. Click here for modem pricing information
You need to have a special radio modem to send
and receive email via SSB. Most SSB email services providers transmit using a
transmission media call PACTOR. PACTOR modems are manufactured by
SCS in Germany. Using PACTOR-3 transmission speeds of 2722 bits per second without data compression can be achieved. PACTOR-4 transmission speeds of 5512 bps without data compression can be achieved. For more information on PACTOR-4 visit p4Dragon SCS P4-Dragon Pactor 4 modem SCS PTC-IIusb Pactor 3 modems front
panel: SCS PTC-IIusb with Bluetooth pactor modems
back panel view: The pactor modem controls the the flow of data across the SSB connection. Data is sent in short bursts called packets, each packet set is acknowled by the other station. If there is an error or corrupted data than the packet of data is re-transmitted until the other station acknowledge that it as been received correctly. Inside SCS PTC-IIusb with Bluetooth pactor
modems: Click here for modem pricing informationData speeds are very slow over HF radio and some satellite and mobile services. To cope with this slow speeds there are a number of email compression services and software, compression helps speed up the throughput of data and reduces cost of satellite connections. Compression removes unwanted data, the level of compression will depend on the data type. JPEG & GIF pictures are already compressed and GRIB files are in a binary format and do not compress very well, plan text messages compress a lot better. Service providers like SailMail and WinLink use a software package called Airmail 3. The Airmail 3 software offer many features:
Click here for PDF file on setting up Sailmail access via Iridium Airmail works with MS Windows XP, Vista and Windows 7. Runing Airmail 3 under Unbutu (Linux) In terminal get a list of devices by typing ls
/dev/ttyUSB* Thats it, close terminal
Sailmail is a USA organization offering SSB email service
to yachtsmen for just $250 year. Sailmail uses a client software package called
Airmail which is available free of charge. Sailmail coverage is very good, with
a global network of stations, including a station here in Europe and the Red
Sea. Sailmail operates on a mixture of private and marine frequencies so do make sure that your marine SSB transceiver has been modified to cover the frequencies operated by Sailmail. The European version of the ICOM M710 and M801 will need to be modified. The best modem to use with Sailmail is the SCS PTC-IIusb with PACTOR III or the new P4dragon which uses PACTOR 4. Either modems with the Airmail software and suitable SSB transceiver allows for remote tuning to the correct SailMail station and frequency SailMail Web site AirMail Web site
Brunei Bay Radio providing low cost HF SSB
radio communications and HF radio (SSB) and e-mail services for yachts, charter
vessels and small-craft in the North West Pacific, Asia and Indian Ocean. The service area extends in a roughly 4000nm radius from BRUNEI BAY RADIO's base, located at approximately 5 degrees North, and 115 degrees East. For further details on Brunei Bay Radio visit Brunei Bay Radio.
To use the Winlink 2000 SSB email system, you
must hold an Amateur Radio licence or be a member of a supported organization
or agency. Use of the system and all software is free of charge for those who
qualify. Winlink 2000 is very similar to SailMail and uses the same Airmail software. Basically Winlink is SailMail but over amateur radio frequencies where SailMail uses marine frequencies. For further details on free SSB email visit winlink 2000 web site.
The Global Link Network offers its clients a
multitude of services in the field of maritime communications via a worldwide
net of service partners. Global Link Network SSB services include:-
For further details on the Global Link Network web site
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