Article sections

    Inmarsat Satellite Network Routing for Calls

    Calls from the terrestrial telephone network (PSTN) to an Inmarsat network are made using the Inmarsat +870 international dialing code. If you are trying to find information on Inmarsat Satellite Network Routing then look no further! Phone calls and data connections are routed by the international telecoms carriers based on the numbering formats described here.

    Inmarsat Constellations

    The Inmarsat network is split into three satellite constellations.

    • Inmarsat-3 constellation – Existing and Evolved services
    • Inmarsat-4 constellation – BGAN/GSPS (2.5g and 3g network)
    • Inmarsat-5 constellation – Global Xpress (IP network)

    The Inmarsat network supports voice phone calls, SMS text messaging, circuit-switched data, fax, Standard IP and Streaming IP.

    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.

    For the Global Xpress platform

    As from 1 January 2014, Inmarsat is introducing a new voice over IP (VoIP) platform called Global Xpress (GX). Calls to these numbers should be at no more than a US $0.15 per minute retail fee, thus offering a reliable and inexpensive way to contact Inmarsat Global Xpress (GX) customers.

    The full Inmarsat GX numbering format, a single T digit format, is as follows:

    +870 t1, x1, x2, x3, x4, y1, y2, y3, y4  where,

    +870 is the country code

    2 (t1), is the T- digit indicating that it is a GX VoIP 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

    2

    9 digits

    9 digits

    Inmarsat GX VoIP

    IP voice calls

    in Services Tags: InmarsatServices