Inmarsat Mobile Number (IMN) – Definition and Pronunciation
What is IMN?
IMN (Inmarsat Mobile Number) is the number assigned by the national routing organisation to an Inmarsat MES as its identity number. An Inmarsat-A maritime IMN has the format 1xxxxxx; an Inmarsat-B maritime IMN has the format 3xxxxxxxxx; an Inmarsat-C maritime IMN has the format 4xxxxxxxxx; an Inmarsat-M maritime IMN has the format 6xxxxxxxxx; and an Inmarsat-mini-M maritime IMN has the format 76xxxxxxxx.
Examples of IMN
To enable shore-based subscribers to transmit calls to any particular end terminal (telephone, fax, telex) connected to a Multi-channel SES, a unique IMN is assigned to each end terminal.
From “Inmarsat M & B: Understanding the System and its Services”.
Data or fax (group 3 fax machine) should preferably be installed on the Second IMN of the SES, with the SES in auto-answer mode. Furthermore, it is recommended that the SESs, when engaged in sending facsimile or data traffic, specify an uncompanded channel in their request burst.
From “Inmarsat-A: Equipment, Procedures, and Distress Communication”.
As mentioned earlier, all SESs are assigned an Inmarsat Mobile Number (IMN), as an identity number. For Inmarsat-A terminals this number consists of seven digits. About 20 % or more of the vessels fitted with Inmarsat-A terminals have two IMNs, depending on which SES model the ship is equipped with.
From “Inmarsat: A Guide to Satellite Communication”.
Pronunciation of IMN
