SCCP:GTT Address Map Configuration

Latest revision as of 08:00, 18 April 2018

This step is used to configure an address map instance for a GTT association of the SCCP layer. These address map entries specify the results of translation. Following the association configuration, the user has to configure address map entries in SCCP.

Description of parameters

General explanation of the configuration parameters:

• The Handle SCCP gtt association parameter specifies the handle of the SCCP global title translation association

• The Action parameter specifies the type of action for this address map. Allowable values: see the 'SCCP GT action type' table in SCCP:GTT Association Configuration.

Note: The range parameters might not be the same as configured in the association. They can be a subset.

• The Replace GT flag parameter specifies whether to replace the GT in outgoing (post GTT) address with the incoming GT

• The Load share flag parameter specifies the mode of operation of SCCP entities. The mode can be either DOMINANT (if flag set to 'False') or LOADSHARE (if flag set to 'True'). Loadsharing among SCCP entities will be achieved on the basis of SLS for class 1 traffic and on round-robin fashion for class 0 traffic.

Note: This parameter is applicable only in ITU96.

• The Global title parameter specifies the global title. Apart from the global title address, the user needs to fill up fields used for finding the rule. See Global Title structure definition below
• The Out network identifier parameter specifies the network id of outgoing addresses

• The Number of entities parameter specifies the number of entities in the 'Out Address' array. Allowable values are 1 - 2.

Note: In ITU96 it should be defined as 2 and in all other versions it should be defined as 1.

• The Array of out address parameter specifies the SCCP entity outgoing address. See Entity structure definition below.

Global Title-specific information

General explanation of the parameters of Global Title specific information:

• The Global title format parameter specifies the type of the global title format. Allowable values: see the 'SCCP GT format type' table in SCCP:GTT Association Configuration.
• The Address length parameter specifies the number of bytes the BCD digits occupy
• The BCD address parameter specifies the BCD digits of SCCP address
• For The Format 1, 2, 3 and 4 parameters (Format1 Format2, Format3 and Format4), see the 'GT Format 1, 2, 3 and 4' explanations and table in SCCP:GTT Association Configuration.

Entity-specific information

General explanation of the parameters of Entity-specific information:

• The Present flag parameter specifies the presence of the address. Allowable values are 'True' or 'False'.
• The No point code in header flag parameter specifies whether or not to include the point code in the SCCP header. Allowable values are 'True' or 'False'.
• The Sub-service field present flag parameter indicates whether the sub-service field contains a valid value. Allowable values are 'True' or 'False'.
• The Sub-service field specifies the type of network. For allowable values, see the 'Sub-service field values' table in MTP3:Userpart Configuration.
• The Subsystem number present flag parameter indicates the subsystem number indicator presence. Used to encode the subsystem number indicator in the address indicator octet of the address parameter in an SCCP message. Allowable values are 'True' or 'False'.
• The Point code present flag parameter indicates the point code indicator presence. Used to encode the point code indicator in the address indicator octet of the address parameter in an SCCP message. Allowable values are 'True' or 'False'.
• The Subsystem number field specifies the subsystem number used to identify the SCCP user. Allowable values: see the table for 'SCCP SSN value to identify SCCP user' in Toolpack:Create a SCCP route.
• The Point code field specifies the point code value
• The Network bit field specifies the network indicator bit. Allowable values: see the table for 'SCCP network bit' in Toolpack:Create a SCCP network.

• The Routing indicator field specifies the routing indicator. Used to encode the routing indicator in the address indicator octet of the address parameter in a SCCP message. Allowable values are:

• The GT parameter specifies the global title. See the Global Title explanation above.