4.4
Saturn Bt – Chapter 4. System␣ ␣
Services
•
Duplex telephone calls – basic telephony services.
•
Simplex telephone calls – LES-to-mobile only.
•
Duplex telefax – CCITT Group 3 facsimile services, 9.6 kbps.
•
Simplex telefax calls – LES-to-mobile only.
•
Simplex Group ID addressing – to a selected group of mobiles.
•
Duplex data communication – Hayes compatible 9.6 kbps data
service.
•
Duplex telex communication.
•
Simplex telex communication.
•
Service Announcements.
•
Duplex high speed data – 56/64 kbps.
•
Simplex high speed data – 56/64 kbps.
Calls from Mobiles
To initiate a call, the user dials the international call prefix 00 prior to
the telephone number for the required destination. The LES code
number is also included, either automatically when using the default
LES, or manually selected from the Display Handset.
The mobile automatically includes information to identify the MES and
the particular end terminal that originates the call. Saturn Bt has six
connections: the Display Handset and five connectors that are nor-
mally configured for telephone and a telefax.
The LES uses the end terminal identifying information (OI) for billing
purposes.
The mobile transmits the dialling information on a channel specially
assigned by the NCS, to the LES, which also has been instructed to
tune to the same channel.
On receiving the call, LES routes it over the public telecommunica-
tions networks to the intended destination. When the called party
responds, the call proceeds.
See simplified call initiation illustrated on the
Communication Cont’d
Communication Cont’d
Summary of Contents for Saturn Bt
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