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GT Definitions !!!

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  • #59542 Reply
    Ashok K
    Guest

    Hi,

    Can anybody explain or refer a doc to explain the GT defintions concept . Like which GTs to be defined in verious N.Es for which purpose. For eg- I know that in HLR we need to define IMSIGT for the Roamers . Similarly what all GTs we need to define for all kind of things – SMS, Roaming etc .I do not see this anywhere explained clearly

    Help will be really appreciated .

    If any doc pls send that at ashok_1978k@rediffmail.com

    #59543 Reply
    C300G
    Guest

    E.214 GT composed of CC+NC+MSIN used in AUTH triplets request in LU callflow. Also used in USSD-requests in roaming.

    E.164 GT composed of CC+NDC used in almost all other SCCP-based callflows. SMS exchange for example.

    E.212 GT – IMSI. I’v never seen it used for something. But opened it on router (just in case).

    #59544 Reply
    Ravi
    Guest

    In the C7 circuit related call scenario, dialled digits determine the trunk route and the trunk route is associated with a C7 route. C7 messages can then be transported via this route. In the non circuit related calls, such as querying the IN or an MSC querying an HLR to find out the location of a subscriber, this association is not possible as there are no trunk circuits involved to associate to a route set. To overcome this issue, the number range to be queried is associated to a route set directly. This mechanism is known as global title routing.

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