partnerships with the National Telecommunications and Information Administration
(NTIA), the National Aeronautics and Space Administration (NASA), the
National Oceanic and Atmospheric Administration (NOAA), and the International
PEACESAT Users Group (IPUG), PEACESAT is able to provide voice, video,
and data services for public service telecommunications.
Voice Teleconferencing Services
PEACESAT Video Teleconferencing Services
PEACESAT Data Services
PEACESAT Voice Teleconferencing Services
VOICE SERVICES -- There are three voice services available (1)
Teleconferencing, (2) Point-to-Point, (3) Phone Patching/Bridging. Users
can teleconference with 52 Sites in 22 countries or states in the Pacific
Islands region. PEACESAT can link these Users in a large teleconference
or as a point-to-point call.
The multi-point teleconferencing uses a simplex communications link
that can be accessed by all sites and the point-to-point teleconferencing
uses a full-duplex link.
TELECONFERENCING -- This service is needed for communication with multiple
sites. PEACESAT teleconferencing service enables all sites to participate
in a single voice teleconference. This is accomplished through a simplex
circuit on the satellite that all sites can receive and transmit on.
It operates like a radio system. One station transmits at a time and
all the Users will all hear the voice transmission.
There is a protocol for passing the transmission from Site to Site.
There are no technical limits to the amount of sites capable of joining
a teleconference, however for a practical interactive teleconferencing
it is more manageable to have a maximum of approximately 7 sites.
Teleconferences require a minimum of one week to schedule and to confirm
Teleconference request involves the completion of a STAN Teleconference
System Use Form. This form should be submitted to the local PEACESAT
Operator who will conduct a preliminary check to see if the suggested
time is free.
POINT-TO-POINT -- This service is needed for communication between
two sites. This type of service request does not require a STAN Teleconference
System Use Form. However it must be coordinated via the PEACESAT operators.
The PEACESAT operators will receive a request and facilitate a schedule
available to both parties involved in the Point-to-Point call.
PHONE PATCH/BRIDGING -- A User does not have to be within a country
or state to use PEACESAT. A User, accessible by telephone anywhere, may
call a PEACESAT Station to be connected to the network-- this service
is called a phone-patch. A User should determine which PEACESAT Station
would be the most appropriate and inexpensive to call.
The PEACESAT Headquarters in Honolulu operates a Westell Audio Bridge
that enables PEACESAT to link external calls to the PEACESAT network.
A User could arrange for teleconference participants from a non-PEACESAT
location to call into the PEACESAT Headquarters audio bridge for connection
to a PEACESAT teleconference. The audio bridge can support up to 10 callers.
TELECONFERENCING PROTOCOL -- The user protocol is based on basic radio
communications. Users in conferences must signal that they are done speaking
by saying "over" or "back to you" or directing the
speaking to another user on the conference. If a user wishes to say something
but is not recognized, the user must break into the conversational chain
by saying "Breaker." The conference chair will usually pass
the conference on to the "breaker."
NETWORK CHANNEL ALLOCATIONS -- There are 9 teleconferencing (or half-duplex)
channels and 3 point-to-point (or full-duplex) channels available for
voice services. The 9 half-duplex channels are also used for point-to-point
calls. The full-duplex channels are reserved for facsimile and data communications.
PEACESAT Video Teleconferencing Services
During the PEACESAT Policy Conference at Sendai, PEACESAT users expressed a
strong requirement for video teleconferencing (VTC). This requirement became
a reality through the design of Digital PEACESAT (aka PEACESAT Services Improvement
Plan or SIP), the Distance Education Learning Technologies and Applications
(DELTA-Hawaii) grant from the U.S. Department of Commerce, and the development
of the State of Hawaii Telehealth Access Network or STAN.
With a digital modem, a Site can communicate at speeds of 64 to 256
Kbps, depending on the type of PEACESAT earth station that is used (e.g.
3m, 3.5m or 6 meter) and whether the earth station is maintained and
aligned properly. This data rate will support compressed video teleconferencing
To take advantage of this capability, however, a Site must have a video
teleconferencing system that will enable video inputs and outputs to
be converted into digital data, a properly aligned antenna, and a digital
satellite modem and interface to the PEACESAT Earth Station.
Through partnerships PEACESAT is able to access two VTC Bridges that
can connect VTC’s via ISDN, Internet Protocol (IP), ATM, and Satellite.
PEACESAT can accommodate VTC’s at varying data rates with any entity
that possesses compliant VTC equipment.
The first step to coordinating a VTC is to fill out and submit both
an Account Request Form and a VTC Request Form to STAN Operations. This
step is vital as a STAN operator will check on the availability of the
requested PEACESAT sites and the status of the VTC Bridges. For more
information please contact STAN Operations at (808) 956-6668 or firstname.lastname@example.org.
PEACESAT Data Services
ELECTRONIC MAIL POST SERVER WITH ANALOG MODEM -- An electronic
mail server is basically a computer and software that is able to store
many messages and electronic files. These files are transferred to a
user computer through a local telecommunications connection that links
a user computer to the electronic mail server.
Local telecommunications link - The communication connection may be
made through a direct connection between computers, a leased telephone
line connection that uses modems over the telephone lines provided by
a local telephone company, or through a dial-up capability that enables
a user computer to dial through the telephone network to enable the modems
to communicate. Once the modems are connected, the user is now linked
to the electronic mail server for electronic mail.
Through a software capability that is provided for in electronic mail
servers, the electronic mail and files are transferred back and forth
between systems. This means that mail that is to be addressed outside
of the local Site environment will be transferred to the PEACESAT host
system in Honolulu and mail addressed to the local Site will be automatically
transferred to the electronic mail server.
Once the transfers have occurred, the following will happen. The mail
that is transferred to PEACESAT Headquarters will be automatically sent
out via the Internet to addressees around the world. The mail that is
transferred to a local Site will then be made available for local distribution
through whatever networks users access the server from.
DIGITAL SATELLITE MODEM FOR HIGHER SPEED COMMUNICATIONS -- The design
of Digital PEACESAT provides an upgrade option for existing PEACESAT
Sites. The option enables a Site to acquire a digital satellite modem
or "DSM" for higher speed communications. The current analog
modems support a speed of up to 14.4 Kbps. A digital satellite modem
supports speeds of up to 64-128 Kbps. The variation in the speed of a
modem will be dependent on location of the Site, whether the terminal
has been maintained well, and whether it is operated well (e.g. alignment
A DSM would then enable the user to transfer more and larger files.
The DSM also does not rely on the full-duplex channel assignments and
would therefore not be limited to the current time slots that are available
to the analog users. PEACESAT Sites that acquire these modems must work
with PEACESAT Headquarters to obtain time slots and capacity allocations.
The Emergency Management Terminals will all have digital satellite
Internet ACCESS -- PEACESAT is also enabling users to have access to
Internet and other services. For these sites, 32-128 Kbps links will
be activated to the Internet link at the University of Hawaii. These
sites will be required to obtain a "router" that will enable
multiple concurrent accesses.
SITE NOTES: To develop an electronic post office and/or to upgrade
the speed for data communications will require Sites to purchase software
(purchase item: electronic mail software), support local dial-in capability
(purchase item: telephone lines and modems), digital modem interface
(purchase item: DMI manufactured by Marine-Air Systems), a digital satellite
modem (purchase item: DSM manufactured by Radyne), and, possibly, a Cisco
router. It will also require installation of the system and training