> 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/sigtran/creating-iua-links.md).

# Creating IUA Links

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

After you create an [IUA](https://prosbcdocs.telcobridges.com/telecom-references/ss7-and-signalling/sigtran/iua) cluster, you must create IUA links for your system.

To create an IUA link:

1- Click **IUA** in the navigation panel

![Create Iua Config 0](https://docs.telcobridges.com/w/images/c/cb/Create_Iua_Config_0.png)

2- Select an IUA SAP

![Select IUA SAP 0](https://docs.telcobridges.com/w/images/f/ff/Select_IUA_SAP_0.png)

3- Select an IUA Cluster

![Select IUA cluster 0](https://docs.telcobridges.com/w/images/4/4d/Select_IUA_cluster_0.png)

4- Click **Create New Iua Link** in the IUA cluster configuration window:

![Create Iua link 0](https://docs.telcobridges.com/w/images/6/69/Create_Iua_link_0.png)

5- Configure the new IUA link:

* Enter a **name** for the link
* Enter an appropriate **interface ID** (must be unique to each link)
* Select a **line service**
* Select a **variant**
* Select a **side**
* Click **Create**

![Create Iua link 1](https://docs.telcobridges.com/w/images/b/b6/Create_Iua_link_1.png)

6- Verify that the **"Iua Link was successfully created"** message appears

![Create Iua link 2](https://docs.telcobridges.com/w/images/a/a1/Create_Iua_link_2.png)

**Path**

```
/configurations/@[configuration_name]/hardware_units/@[hardware_name]/iua_stacks/@[iua_stack]/iua_saps/@[iua_sap]/iua_clusters/@[iua_cluster]/iua_links/@[iua_link]
```

**Parameters (text)**

```
/configurations/@[configuration_name]/hardware_units/@[hardware_name]/iua_stacks/@[iua_stack]/iua_saps/@[iua_sap]/iua_clusters/@[iua_cluster]/iua_links/@[iua_link]
intf_id      = "2"
intf_id_type = "Integer"
name         = "@[iua_link]"

/configurations/@[configuration_name]/hardware_units/@[hardware_name]/iua_stacks/@[iua_stack]/iua_saps/@[iua_sap]/iua_clusters/@[iua_cluster]/iua_links/@[iua_link]
isdn_variant        = "NET5"
line_service        = "E1_LS_4"
side                = "User"

/configurations/Allyn_Config2/hardware_units/TB014369/iua_stacks/Iua0/iua_saps/IuaSap/iua_clusters/IuaCluster/iua_links/IuaLink0/parameters/advanced_parameters
flow_ctrl_end_msu_threshold   = 32
flow_ctrl_start_msu_threshold = 64
keep_layer1_up                = false
max_frame_length              = 260
max_outstanding_frames        = 8
max_retransmission            = 3

/configurations/Allyn_Config2/hardware_units/TB014369/iua_stacks/Iua0/iua_saps/IuaSap/iua_clusters/IuaCluster/iua_links/IuaLink0/parameters/timers
congestion_timer = "3 seconds"
connection_timer = "1 second"
t200_timer       = "1 second"
t203_timer       = "10 seconds"
```

**Parameters (json)**

```
{
  "intf_id" : "2",
  "intf_id_type" : "Integer",
  "name" : "@[iua_link]",
  "parameters" : {
    "advanced_parameters" : {
      "flow_ctrl_end_msu_threshold" : 32,
      "flow_ctrl_start_msu_threshold" : 64,
      "keep_layer1_up" : false,
      "max_frame_length" : 260,
      "max_outstanding_frames" : 8,
      "max_retransmission" : 3
    },
    "isdn_variant" : "NET5",
    "line_service" : "E1_LS_4",
    "side" : "User",
    "timers" : {
      "congestion_timer" : "3 seconds",
      "connection_timer" : "1 second",
      "t200_timer" : "1 second",
      "t203_timer" : "10 seconds"
    }
  }
}
```

### List of Parameters

* [Name](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/m3ua#n)
* [Interface ID](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/m3ua#i)
* [Variant](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/isdn#i)
* [Side](https://prosbcdocs.telcobridges.com/telecom-references/parameter-reference/isdn#s)


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