> For the complete documentation index, see [llms.txt](https://prosbcdocs.telcobridges.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://prosbcdocs.telcobridges.com/telecom-references/protocols/tcap-userpart-configuration.md).

# TCAP Userpart configuration

* The **Structure version** parameter is the structure version identifier. This parameter must be set to 1.
* The **Unique identifier TCAP Userpart** parameter specifies the unique ID of the TCAP Userpart for a SS7 system.
* The **Unique identifier SCCP Userpart** parameter specifies the unique ID of the SCCP Userpart for a SS7 system.
* The **Subsystem number** parameter specifies a subsystem number for this userpart. This field is not reconfigurable. Allowable values are from 1 to 255. See the table 'SCCP SSN value to identify SCCP user' in SCCP:Route Configuration.

***

* The **Protocol variant** parameter specifies the TCAP protocol variant required to provide service to the userpart connected through this upper SAP (Service Access Point). The following values are allowed:

| Protocol Variant | Description        |
| ---------------- | ------------------ |
| ANSI88           | Used for ANSI 1988 |
| ANSI92           | Used for ANSI 1992 |
| ANSI96           | Used for ANSI 1996 |
| ITU88            | Used for ITU 1988  |
| ITU92            | Used for ITU 1992  |
| ITU96            | Used for ITU 1996  |
| ETSI96           | Used for ETSI 1996 |

***

* The **T1 timer** parameter specifies the TCAP invoke timer default value. If the invoke timer value received in component request is zero, then TCAP uses the configured invoke timer default value to start the invoke timer. Allowable values are from 0 to 65,535.

**NOTE:** This parameter is relevant only in ITU implementation.

***

* The **T2 timer** parameter specifies the TCAP reject timer default value. Allowable values are from 0 to 65,535.

**NOTE:** This parameter is relevant only in ITU implementation.

***

* The **Lost connection timer** parameter specifies the TCAP provider connection timer. This is used by TCAP provider to detect lost connections. Allowable values are from 0 to 65,535.


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