> 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/tmedia-documentation/configuration/web-portal-3-3/protocol-stack/sccp-tcap/creating-an-sccp-ssn.md).

# Creating an SCCP SSN

> **Applies to:** Tmedia 3.0, 3.2, 3.3

After you configure an SCCP Route, you can add [SCCP](https://prosbcdocs.telcobridges.com/telecom-references/ss7-and-signalling/sccp) [Sub-System Number](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number) (SSN) on the route.

SCCP [Sub-System Number](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number) are used to identify applications of this route's DPC. [SCCP managament](https://prosbcdocs.telcobridges.com/telecom-references/ss7-and-signalling/sccp/sccp-managament) will maintain the availability state for each [SSN](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number) associated with the route's DPC. The [SSN](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number) management status affects the routing decision. If a peer [SSN](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number) is unavailable, the SCCP stack will try an alternate DPC/route.

To Create an SCCP SSN:

1- Select **SCCP** from the navigation panel

![Create SCCP Stack 0](https://docs.telcobridges.com/w/images/f/fa/Create_SCCP_Stack_0.png)

2- Select an SCCP Network

![Select SCCP Network 0](https://docs.telcobridges.com/w/images/0/0b/Select_SCCP_Network_0.png)

3- Select an SCCP LSAP

![Select SCCP LSAP 0](https://docs.telcobridges.com/w/images/9/93/Select_SCCP_LSAP_0.png)

4- Select an SCCP Route

![Select SCCP Route 0](https://docs.telcobridges.com/w/images/a/a5/Select_SCCP_Route_0.png)

5- Click **Create New SSN** from the SCCP route configuration window

![Create SCCP SSN 0](https://docs.telcobridges.com/w/images/e/eb/Create_SCCP_SSN_0.png)

6- Configure the new SCCP SSN:

* Choose a [Sub-System Number](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number) for this route's DPC
* Select a [Replication Mode](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sccp#r) (ANSI and Telcordia only)
* Select the [First Concerned Point Code](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sccp#s) that requires immediate notification upon state change of this peer [SSN](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number)
* Select the [Second Concerned Point Code](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sccp#s) that requires immediate notification upon state change of this peer [SSN](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number)
* Click **Create**

![Create SCCP SSN 1](https://docs.telcobridges.com/w/images/8/8b/Create_SCCP_SSN_1.png)

7- Verify that the **"SccpRtSsn was successfully created"** message appears

![Create SCCP SSN 2](https://docs.telcobridges.com/w/images/b/bb/Create_SCCP_SSN_2.png)

8- Configure [SCCP Route SSN Backup Point Code](https://prosbcdocs.telcobridges.com/telecom-references/ss7-and-signalling/sccp/sccp-route-ssn-backup-point-code)

* Assign [Backup Point Codes](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sccp#s) to use in case this peer [SSN](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number) is not available.

![Create SCCP SSN 3](https://docs.telcobridges.com/w/images/f/f9/Create_SCCP_SSN_3.png)

* **Note: For each selected point codes, a valid SCCP route must exist**.

**Path**

```
/configurations/@[configuration_name]/sccp_stacks/@[sccp_stack]/sccp_networks/@[sccp_network]/sccp_lsaps/@[sccp_lsap]/sccp_routes/@[sccp_route]/sccp_ssns/@[sccp_ssn]
```

**Parameters (text)**

```
/configurations/@[configuration_name]/sccp_stacks/@[sccp_stack]/sccp_networks/@[sccp_network]/sccp_lsaps/@[sccp_lsap]/sccp_routes/@[sccp_route]/sccp_ssns/@[sccp_ssn]
backup_point_codes          = [ "@[point_code]" ]
first_concerned_point_code  = "@[point_code]"
options                     = [ "ACCESSIBLE_BY_DEFAULT" ]
replication_mode            = "DOMINANT"
second_concerned_point_code = "@[point_code]"
sub_system_number           = 1
```

**Parameters (json)**

```
{
  "backup_point_codes" : [
    "@[point_code]"
  ],
  "first_concerned_point_code" : "@[point_code]",
  "options" : [
    "ACCESSIBLE_BY_DEFAULT"
  ],
  "replication_mode" : "DOMINANT",
  "second_concerned_point_code" : "@[point_code]",
  "sub_system_number" : 1
}
```

### List of Parameters

* [Sub-System Number](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sub-system-number)
* [Replication Mode](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sccp#r)
* [First Concerned Point Code](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sccp#s)
* [Second Concerned Point Code](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/sccp#s)


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