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Subel. I
6 questions
Subelement I
Inmarsat Equip. & Comms:
Section 70
Iridium - Address and Dialing
How is a voice call to a shoreside destination typically dialed from an Iridium terminal handset?
  • Dial * to gain access to the Iridium system then dial the country code, subscriber I.D. and then the # sign.
  • Dial 00 for automatic dialing, then dial the country code and IMN, then the +sign
  • Dial 00 for automatic dialing, dial the country code subscriber I.D and IMN and then the #sign
  • Correct Answer
    Dial 00 for automatic dialing, then the country code and subscriber I.D.
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What is an advantage of an Iridium terminal for making voice calls?
  • Correct Answer
    It can use compatible terrestrial cellular phone networks if available.
  • Dual use technology permits Inmarsat satellites as well as Iridium satellites to be used.
  • Dual use technology permits terrestrial cellular phone calls and Inmarsat calls.
  • It can make calls only through the Iridium satellite system.
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How would a shoreside party dial an Iridium terminal on a ship?
  • Dial the Inmarsat satellite gateway and then 881612345678.
  • Correct Answer
    Dial the national exit code and then 881612345678
  • Dial the national exit code and then 870766891244#
  • Dial the Iridium national access code and then 881612345678#
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What entry would you make on an Iridium terminal to make a telephone call to an Inmarsat terminal on another ship that is 300 miles west of San Francisco?
  • 00582430353680#
  • 00881612376935
  • Correct Answer
    00870765890074
  • 00582336850450+
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What entry would you make on an Iridium terminal to make a telephone call to another Iridium terminal?
  • 00870765439082
  • 00230882419#
  • Correct Answer
    00881648769345
  • 8821675902419
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What is an advantage of the Iridium system for placing ship-ship calls?
  • Iridium terminals are compatible with the Inmarsat system for maximum flexibility.
  • All ship-ship calls are passed through Iridium ground stations and then forwarded to the other ship.
  • Ships-ship calls are routed through the satellites and passed through ground stations.
  • Correct Answer
    Iridium satellites can pass the calls directly to the other ship using gateway signaling.
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