Translation Type (TT) Maps

2.28 Translation Type (TT) Maps

This section provides a brief description for Translation Type (TT) Maps Support feature.

Certain SCCP messages include a Called Party Address parameter, which has a translation type field. The translation type field indicates the type of global title processing required at the STP. The values utilized in any given network may differ from the standardized values defined for internetwork applications.

The translation type mapping feature enhances the functionality of the vSTP by allowing the standardized translation type code values for internetwork applications to be mapped to intranetwork values used within any particular network as well as intranetwork values to be mapped to internetwork values.

TT maps feature is only applicable on UDT and XUDT messages with global title indicator (GTI) is 2 (For ANSI/ITU Domain) or 4 (For ITU Domain).

Example:

A TT Map is defined as 
{
"linksetName":"ls1",
 "existingTT":25,
 "modifiedTT": 40,
 "ingressEgress":"Ingress",
 "name": "ttmap1"
}

Any UDT or XUDT messages with global title indicator (GTI) is 2 (For ANSI/ITU Domain) or 4 (For ITU Domain) incoming on “ls1” linkset having SCCP Called Party TT as 25 will be modified to have SCCP Called Party TT as 40.