# Global Title Translation Association Configuration Mode Commands

The Global Title Translation (GTT) Association configuration mode provides the commands to create the rules for translating the global titles (destination point codes and subsystem address in the messages) used for routing at the SCCP layer.
Upon accessing this mode, your prompt should look similar to the following:

    [local] <hostname> (config-gtt-addrmap-<instance#>)#

IMPORTANT:

The commands or keywords/variables that are available are dependent on platform type, product version, and installed license(s).
action

This command configures the actions that determine the operation of rules of the global title translation (GTT).
Platform:

ASR 5000
Product:

SGSN
Privilege:

Security Administrator, Administrator
Syntax

    action id id type  action_type  start-digit  value   end-digit valueno action id id

id

id uniquely identifies an action. The id must be an integer from 1 to 15.
type action_type

The following defines the action rules that will determine how global titles (GT) are translated to locally understood addresses - in most cases point codes (PC). The command can be re-issued multiple times to define multiple action rules.

- constant: Defines the starting digit in the range of digits in the incoming global titles that are translated to fixed addresses.
- fixed: Defines the starting digit in a fixed range of digits used for performing GTT.
- gt-to-pc: Use these digits as first of range of global title digits in incoming message to convert to point code for routing.
- insert-pc: Defines the rule for inserting destination point code before the incoming GTAI and change TT, ES and NAI. Use digits of incoming message global title digits as pc for routing.
- selins: Selective insertion type to perform GTT.
- strip-pc: Strip first 6 digits from GTAI if first 6 dgts in stripped point code are in INT format.
- var-asc: Use a varaible number of digits, in ascending order, to perform GTT.
- var-des: Use a variable number of digits. in descending order. to perform GTT.

start-digit value

value must be an integer from 0 to 255.
end-digit value

value must be an integer from 0 to 255.
Usage:

Use this command to create GTT association rules. Rules can be based on ranges of digits or modified ranges depending upon the action types included in the commands.

Example

Example
Use the following command to create a global title translation rule that bases the translation on a fixed range of digits starting at 23 and ending at 122:

    action id 1 type fixed start-digit 23 end-digit 122

description

This command defines a descriptive string to facilitate identification of this particular global title translation (GTT) association. This is used for operator reference only.
Platform:

ASR 5000
Product:

SGSN
Privilege:

Security Administrator, Administrator
Syntax

    description stringno description

string

Specifies the alphanumeric string that is stored. must be from 1 through 127 alphanumeric characters. Strings with spaces must be enclosed in double-quotes. See the example below.
no

Removes the description string from the current global title translation association configuration.
Usage:

Use this command to set a description for reference by operators.
Example:
The following command sets the description to identify a routing domain for messages transmitted within a national boundary.

    description “GTT
    database 2”

end

Exits the configuration mode and returns to the Exec mode.
Product:

SGSN
Privilege:

Security Administrator, Administrator
Syntax

    end

Usage:

Change the mode back to the Exec mode.
exit

Exits the configuration mode and returns to the Global configuration mode.
Product:

SGSN
Privilege:

Security Administrator, Administrator
Syntax

    exit

Usage:

Return to the Global configuration mode.
gt-format

This command creates an instance of a global title formatting that is applied to the database in the process of address translation. Once the command is completed, the system enters global title (GT) format database configuration mode. The commands for configuration can be found in the GT Format Configuration Mode chapter in this reference guide.
Platform:

ASR 5000
Product:

SGSN
Privilege:

Security Administrator, Administrator
Syntax

    gt-format format_num

format_num

- 1: Selects GT-format 1 options which include nature-of-address and odd/even. Once selected, the system enters GT-Format1 configuration mode.
- 2: Selects GT-format2 options which include translation-type. Once selected, the system enters GT-Format2 configuration mode.
- 3: Selects GT-format3 options which include encoding-scheme, numbering-plan, and translation-type. Once selected, the system enters GT-Format3 configuration mode.
- 4: Selects GT-format4 options which include encoding-scheme, nature-of-address, numbering-plan, and translation-type. Once selected, the system enters GT-Format4 configuration mode.

Usage:

Selects GT format #2 for the database GTT process.

Example

Example
Use this command to associate the GT format for GTT:

    gt-format  2

variant

This command configures the choice of national standard protocols to associate with the GTT process databases.
Platform:

ASR 5000
Product:

SGSN
Privilege:

Security Administrator, Administrator
Syntax

    variant type

default

Sets the variant configuration to itu.
type
The following network variant national standards-based protocols are possible:

- ansi
- china
- itu
- japan

Usage:

Use this command to select the national standard protocols to associate with the GTT process database.
Example:
The following command sets the variant to ansi:

    variant ansi