SAILOR TT-3084A Fleet 77 SAILOR TT-3086A Fleet 55 - Polaris-as.dk

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Chapter 3: Getting started
ISDN Connection 3.6
Introduction 3.6.1
Note The ISDN service is only available on Fleet55 systems when the
vessel is positioned inside an area with Spot Beam coverage. On
Fleet77 systems the services are also available in global beam.
Though 128K can not be guaranteed by INMARSAT.
The Integrated Services Digital Network (ISDN) enables a bidirectional
transmission of data to and from terrestrial ISDN networks.
The mobile ISDN service is charged by connection time. That makes the service
feasible for transmissions that require a large data throughput.
The section Setting up ISDN on page 112 contains a description of how to setup
an ISDN data connection on your PC.
Supported services 3.6.2
The Fleet55 and the generic Fleet77 support a single B-channel (1 x 64 kbit/s
Data) and one D-channel (control).
The Fleet77 optionally supports two B-channels (2 x 64 kbit/s Data). In order to
enable this service a pin code is needed. This pin code can be retrieved from
your distributor. As with other services the terminal needs to be commissioned
to the 128 kbit/s service.
The terminal does not support dynamic switching between one and two Bchannels.
The user needs to decide whether to use one or two channels before
establishing the call. The Fleet77 128 kbit/s service does not support mixed
fixed and mobile originated calls, mixed UDI and voice calls nor the ability to
close down one of the B channels dynamically.
For fixed originated calls, the terrestrial user is expected to dial the same INM
number twice for each of the 64kbit/s calls.
Please refer to ISDN interface on page 16 for additional information about the
ISDN interface.
ISDN Connection 47
Getting started