Global Title Translation

Overview

As networks grow and become more complex and cross international boundaries, routing between different nodes becomes more complex. One way to simplify this routing requirement is to implement Global Title Translation (GTT), which routes according to a digit analysis rather than Point Code (PC) and Subsystem Number (SSN).

Supports Advanced Features

Excel’s Global Title Translation (GTT) feature integrated on the CSP provides the routing functionality required to offer services with advanced features such as local number portability (LNP), toll-free, calling card, calling name delivery, and roaming support, as well as other advanced network services.

Capacity Information

The GTT feature supports the following:

• 128 GT groups

• 100,000 entries

• maximum of 24 digits

How Invoked

The GTT functionality enables the Signaling Connection Control Part (SCCP) to translate and route the SCCP message in cases where the Called Party Address contains a Global Title and the routing indicator is set to "Route on GT". GTT functionality also enables the SCCP to have relay functionality. The GTT function is invoked within the SCCP Routing Control (SCRC) under the routing procedures. The Global Title Addressing and GTT feature will allow diverse groups of SCCP addressable entities associated with different applications to establish their own addressing schemes.

Redundancy

The GTT feature supports the same level of redundancy as all other levels of SS7 functionality implemented on the CSP.

Hardware Requirements

This GTT implementation on the CSP requires the SS7 Series 3 card.

Limitations

GTT implementation on the CSP is not configurable on the SS7 PQ card.

Configuring Global Title Translation

Refer to the following sections for information to configure Global Title Translation.

• Procedures for configuring options

• Global Title Translation (GTT) Configuration Samples

API Messages

The following API messages support Global Title Translation. They are documented in the API Reference.

• SS7 SCCP/TCAP Configure (0x0077)

• SS7 SCCP/TCAP Query (0x0078)

TLVs

The following Tag Length Values (TLVs) support Global Title Translation. They are documented in the API Reference.

• 0x09CA Add Global Title Group

• 0x09CB Delete Global Title Group

• 0x09CC Add Global Title Entry

• 0x09CD Delete Global Title Entry

• 0x09CE Build Index Table

• 0x09CF Global Title Group Query

• 0x09D0 Global Title Entry Query

• 0x09D1 Global Title Group Query Response

• 0x09D2 Global Title Entry Query Response