Thrane&Thrane TT-3080A, Руководство пользователя, Страница: 15 / 124

Hardware interfaces Hardware interfaces Hardware interfaces Hardware interfaces Description of the service Description of the service Description of the service Description of the service
7Sep01 7Sep01 7Sep01 7Sep01 Page Page Page Page 2-3 2-3 2-3 2-3
Important Notice: Important Notice: Important Notice: Important Notice: Before a terminal can be used on the network, it
has to be commissioned by one of the Inmarsat Service Providers
(ISP’s). In order to use the different Global Area Network services
it is necessary to have at least one Inmarsat Mobile Number (IMN)
for each of the above mentioned services. In case all 8 services
are commissioned on your terminal, you will have 8 IMN
numbers.
Calling a Global Area Network terminal is equal to making
international calls. If the satellite region/area is not known for the
terminal the “country” code for a terminal is 870. When you dial a
Global Area Network terminal through the public network, you
have to dial the IMN number in addition to the international
access code for Inmarsat, e.g.:
+870 762 555 555
Making calls from a Global Area Network terminal is equal to
making international calls as the country code always has to be
dialled
Service Explanation: Service Explanation: Service Explanation: Service Explanation:
The mini-M services have a lower tariff than the high speed
services, as these are high quality audio or high speed data
services and thus require more bandwidth.
The 64 kbit/s UDI
64 kbit/s UDI 64 kbit/s UDI
64 kbit/s UDI (Unrestricted Digital Information) service
enables the bi-directional transmission of data to and from
terrestrial 64 kbit/s ISDN
ISDN ISDN
ISDN networks. The 56 kbit/s UDI
56 kbit/s UDI 56 kbit/s UDI
56 kbit/s UDI service is
similarly used to make a connection to 56 kbit/s ISDN networks,
which are primarily used in North America.
The Speech
Speech Speech
Speech and 3.1 kHz audio
3.1 kHz audio 3.1 kHz audio
3.1 kHz audio services make it possible to
establish high quality analogue connections with quality equal to
terrestrial analogue connections via digital networks/switches.
The Speech
Speech Speech Speech service is used for high quality voice connections,
whereas 3.1 kHz audio 3.1 kHz audio 3.1 kHz audio 3.1 kHz audio can be used to transfer analogue signals