🔍 Key Concepts

• Store-and-forward messaging used by Inmarsat-C (not real-time voice/data) • Typical average delivery time for Inmarsat-C TELEX vs. other services • Difference between Inmarsat-C and Inmarsat-FBB capabilities

💭 Think About

• Does Inmarsat-C normally work like a live phone call, or more like email that is queued and forwarded? • Look at the options that make very strong or absolute claims (like "all" communications or "only through" a certain service). Are those consistent with how multiple Inmarsat services are usually designed? • Among the remaining choices, which one best matches the idea of a short but noticeable delay rather than instant or very long waiting?

✅ Before You Answer

• Confirm that Inmarsat-C is a store-and-forward system, so some delay is expected. • Check whether fax and data over Inmarsat-C typically behave differently in delivery time from TELEX, or if they use the same basic store-and-forward path. • Verify whether delivery notification is a feature unique to Inmarsat-FBB or also available in other Inmarsat services.