Upgrading from Global Title Translation (GTT) to Enhanced Global Title Translation (EGTT)

The Enhanced Global Title Translation (EGTT) feature provides enhancements to existing global title translation functions and automatically updates the database when the EGTT feature is turned on. Turning on the EGTT feature overrides the Global Title Translation (GTT) feature. This section provides a high-level summary of feature enhancements, the upgrade process, and upgrade considerations for the GTT and EGTT features.

Note:

Before upgrading to and/or turning on a new feature, make sure you have purchased the feature to be upgraded to and/or turned on. If you are not sure whether you have purchased the feature, contact your Oracle Sales Representative or Account Representative.

Enhancements

The Enhanced Global Title Translation (EGTT) feature provides enhancements to existing global title translation functions:

• Increased number of selectors
• For ITU networks, addition of the translated subsystem number (SSN) in the called party address (CDPA) when octet is not equipped
• For ITU networks, inclusion of the originating point code (OPC) in the calling party address (CGPA)
• Capability to delete the global title (GT) in the called party address (CDPA)
• GTAs can be added offline to the EAGLE if the GTT set has not yet been assigned to a GTT selector.
• Aliasing is replaced by assigning multiple GTT selectors to an existing GTT set.
• Automatic upgrade of the database when the EGTT feature is turned on.

Upgrade Considerations

Enabling the Enhanced Global Title Translation (EGTT) feature overrides the Global Title Translation (GTT) feature. The GTT Selector, GTT Set, and GTA commands replace the Translation Type (-TT) and Global Title Translation (-GTT) commands. The SEAS equivalent of these commands will be maintained, mapping to ANSI with GTI of 2.

These commands can be executed when the EGTT feature is turned on, but will only produce CDGTA GTT sets and CDGTA GTT selectors.

• ENT-TT – Enter Translation Type
• CHG-TT – Change Translation Type
• DLT-TT – Delete Translation Type
• RTRV-TT – Retrieve Translation Type
• ENT-GTT – Enter Global Title Translation
• CHG-GTT – Change Global Title Translation
• DLT-GTT – Delete Global Title Translation
• RTRV-GTT – Retrieve Global Title Translation

If the point code that is specified with the ent-gtt or chg-gtt commands is an ANSI point code, only a CDGTA GTT selector entry that contains the translation type and the GTI value 2 will be shown in the rtrv-gttsel output. If the point code that is specified with the ent-gtt or chg-gtt commands is an ITU point code, two CDGTA GTT selector entries will be shown in the rtrv-gttsel output; one that contains the translation type and the GTI value 2 and another entry that contains the translation type and the GTI value 4. The CDGTA GTT sets and CDGTA GTT selectors will contain the default values for the Advanced GTT feature parameters, shown in Table 2-27.

Table 2-27 GTT Set and GTT Selector Advanced GTT Feature Default Parameter Values

SELID - none	CGSSN - no value	LSN - any
NP - dflt (if GTI=4, no value if GTI=2)	NAI - dflt (if GTI=4, no value if GTI=2)	SETTYPE - CDGTA

The following commands will be turned on when the EGTT feature is turned on:

• ENT-GTTSET – Enter GTT Set
• CHG-GTTSET – Change GTT Set
• DLT-GTTSET – Delete GTT Set
• RTRV-GTTSET – Retrieve GTT Set
• ENT-GTTSEL – Enter GTT Selector
• CHG-GTTSEL – Change GTT Selector
• DLT-GTTSEL – Delete GTT Selector
• RTRV-GTTSEL – Retrieve GTT Selector
• ENT-GTA – Enter Global Title Address
• CHG-GTA – Change Global Title Address
• DLT-GTA – Delete Global Title Address
• RTRV-GTA – Retrieve Global Title Address

GTT Set Commands

GTT Set commands are used to provision new sets for global title translation, linking GTT Selector (GTTSEL) and Global Title Address (GTA) commands. This set of commands provides greater flexibility when provisioning the type of messages that require global title translation. There are no SEAS equivalents for these commands.

GTT Selector Commands

GTT Selector commands are used to provision new selectors for global title translation. Together with the GTT Set commands, they replace the Translation Type (TT) commands, providing greater flexibility when provisioning the type of messages that require global title translation. There are no SEAS equivalents for these commands.

GTA Commands

GTA commands are used to provision GTTs using the new selectors for GTT. These commands replace the Global Translation Type (GTT) commands.

Upgrade Process

When existing systems are upgraded from the GTT feature to the EGTT feature, the GTT_TBT table is converted to the GTT Selector and GTT Set tables using the data present in the GTT_TBT table. Set names are automatically picked for each entry in the GTT_TBT table, unless a TT Name is already provided. ANSI translation types are converted as is and given the GTI of 2. ITU translation types are converted to use two separate entries, one with the GTI of 2 and the other with the GTI of 4. During the conversion, DFLT (default) is assigned to the NP and NAI parameters for the GTI 4 entries. These values can then be changed to more specific values with the ent-gttsel command.

Aliases versus Selectors

One of the important differences between the GTT and EGTT features is the more flexible creation and use of “aliases”, which are replaced by selectors in the EGTT feature. Global title translation data can be built before bringing it into service and the service to existing global titles remains uninterrupted by allowing selector values to be changed instead of having to be deleted.

The flexibility in assigning selectors to sets of global title translation data is shown in Table 2-28 in the reuse of the selector for setint000. In this example, you can break up GTT selectors into more specific entries (other than dflt) without having to delete the entire GTT data set for a selector.

GTT data can be built without being used until a link is added to a selector (specifying GTTSN with the CHG-GTTSEL command). At the same time, selectors can be changed without affecting existing global titles.

Table 2-28 shows an alias entry, GTII=4, TT=0, NP=E164, NAI=INTL, added to the same GTT set setint000 as several other selectors.

Table 2-28 Use of Aliases in GTT Selector Table

GTIA	TT	NP	NAI	GTTSN
2	1	---	---	setans001
2	9	---	---	lidb
2	10	---	---	t800
2	253	---	---	t800
GTII	TT	NP	NAI	GTTSN
4	0	DFLT	DFLT	setint000
2	0	---	---	setint000
4	9	DFLT	DFLT	IMSI
2	9	---	---	IMSI
4	18	DFLT	DFLT	IMSI
2	18	---	---	IMSI
4	0	E164	INTL	setint000