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Appendix H – System description cont'd
Calls from Mobiles
To make an outgoing call, you use a standard international telephone
number with the 00 prefix. The mobile automatically includes informa-
tion to identify the MES and the particular port that originates the call.
The WorldPhone has four ports: the basic Telephone Unit w/handset,
and three connectors that are configured for telephone, data and
telefax.
The LES uses the end terminal identifying information (OI) for billing
purposes.
The mobile transmits the dialing information on a channel specially
assigned by the NCS, to the LES, which also has been instructed to
tune to the same channel. LES routes the call over the public tele-
communications networks to the intended destination. When the
called party responds, the call proceeds.
Calls to Mobiles
The WorldPhone terminal receives incoming calls via the IMN phone
numbers. IMN numbers are assigned to the following ports:
• Basic Telephone Unit (handset)
• Telephone (TEL port)
• Telefax service (FAX port)
• Data service (DATA port)
• NIMS service
Calls are made as ordinary international (Satellite) calls where each
Ocean Region has an international country code. If an area is cov-
ered by more than one satellite, it is necessary that the caller knows
which satellite (Ocean Region) the mobile is tuned to, or if not known
try the other satellite(s).
The international codes to the four Ocean Regions are as follows:
• Atlantic Ocean East Region:
• Pacific Ocean Region:
• Indian Ocean Region:
• Atlantic Ocean West Region:
Note! Some Net service providers support the common Ocean Region
access no. 870, which connects the call to the dialed WorldPhone regardless
of the Ocean Region the user currently communicates through.
Services
• Telephone calls – basic telephony services.
• Telefax – CCITT Group 3 facsimile services, 2.4 kbps.
• Data communication – Hayes compatible 2.4 kbps data service.
• Mail service – NIMS
H-4
871
872
873
874
WorldPhone – Chapter 5. Appendices
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