Inmarsat Satellite Network Routing for Calls

Phone calls from the terrestrial PSTN #

Telephone calls from the terrestrial telephone network (PSTN) to an Inmarsat network are made using the Inmarsat +870 single number access code, which is the same as a country code number.

For Existing and Evolved services #

The full Inmarsat E&E numbering format, a dual T digit format, is as follows:

+870 t1, t2, x1, x2, x3, y1, y2, y3, y4 where,

+870 is the country code

t1, t2 are the two T- digits indicating that it is an Existing and Evolved call.

NDC (National Destination Code) or leading digits of N(S)N (National (Significant) Number) Inmarsat T-digit(s)	N(S)N number length	Usage of E.164 number	Additional service information	Description
30 – 37	9 digits	9 digits	Inmarsat B	Maritime mobile normal calls
38	9 digits	9 digits	Inmarsat B	Land mobile normal calls
39	9 digits	9 digits	Inmarsat B	Land and maritime high-speed data calls
50 – 57	9 digits	9 digits	Inmarsat Aeronautical	Primary addressing
58	9 digits	9 digits	Inmarsat Aeronautical	Alternate addressing
59	9 digits	9 digits	Inmarsat Aeronautical	Special facilities
60	9 digits	9 digits	GAN	Maritime mobile ISDN calls
61 – 67	9 digits	9 digits	Inmarsat M	Maritime mobile normal calls
68 – 69	9 digits	9 digits	Inmarsat M	Land mobile normal calls
76	9 digits	9 digits	Inmarsat mini M GAN Inmarsat Fleet	Maritime or land mobile normal calls

 

For BGAN and GSPS connections #

The full Inmarsat BGAN numbering format, a dual T digit format, is as follows:

+870 t1, t2, x1, x2, x3, y1, y2, y3, y4 where,

+870 is the country code

7 (t1),  7 (t2) are the two T- digits indicating that it is a BGAN call

NDC (National Destination Code) or leading digits of N(S)N (National (Significant) Number) Inmarsat T-digit(s)	N(S)N number length	Usage of E.164 number	Additional service information	Description
77	9 digits	9 digits	Inmarsat BGAN/GSPS voice	Mobile voice calls
78	9 digits	9 digits	Inmarsat BGAN/GSPS ISDN	Mobile ISDN calls

 

Interconnect operators – the international telecoms carriers #

Inmarsat is connected to most international telecoms carriers.

It is the responsibility of the telecoms carriers worldwide to ensure that they have arrangements in place to switch voice calls between the PSTN and the Inmarsat network.

Voice and ISDN testing for carriers #

To assist carriers in ensuring that their access is properly configured, two test numbers have been established within the BGAN network:

For BGAN voice: +870 77 210 9000

For BGAN ISDN and fax: +870 78 210 9000

To assist carriers in ensuring that their access is properly configured, a test number has been established within the GX network:

For Global Xpress voice + 870 23 199 9999

Each number provides access to a suitable voice announcement.

Short Message Service (SMS) text messaging #

Inmarsat is a full member of the GSMA and supports roaming SMS connectivity.

Inmarsat can send SMS text to more than 1,000 telecommunications carriers globally.

Inmarsat has contracted SAP 365 as the SMS Hubbing partner and all SMS should flow through SAP.

It is the responsibility of the sending party carrier to send SMS to Inmarsat. More than 500 carriers can successfully send to Inmarsat.

An originating carrier should open the range +870 and deliver the SMS to SAP 365.

Roaming – MNC 901 MCC 11 #

Inmarsat has contracted Comfone as the Roaming Hub partner and all roaming arrangements should be made with Comfone. Inmarsat uses Comfone for all clearing and signaling.

Meet-me points for Inmarsat’s IP data network #

Inmarsat has meet-me points in Amsterdam (Telecity) , Sydney (HMSP/NTTICT) and New York (Hudson Street).

Customers can connect to any of these nodes in order to access the Inmarsat global backbone.

Inmarsat offers standard internet access, APN routeing and a large selection of IP value-added services.