# Pass single and multi-channel lines

Source: https://developer.avalara.com/products/communications/integration-guides/communications-integration/evp8336849313165/

Guide: Communications

# Pass single and multi-channel lines

**Element type: Required for Voice**

**Endpoints used:** [LineItem](https://developer.avalara.com/api-reference/communications/v2/models/LineItem/)[https://developer.avalara.com/api-reference/communications/v2/methods/Lookups/GetTsPairs/](https://developer.avalara.com/api-reference/communications/v2/methods/Lookups/GetTsPairs/)

Your voice integration must be able to pass both single- and multi-line channel lines in a transaction.

**View example**:

```
"itms": [
    {
        "ref": "1_CertTest4_1_PCD_BaseMRC",
        "chg": 15,
        "line": 0,
        "sale": 1,
        "tran": 19,
        "serv": 6,
        "adj": false
    },
    {
        "ref": "1_CertTest4_1_PCD_LineCount",
        "chg": 0,
        "line": 1,
        "sale": 1,
        "tran": 19,
        "serv": 21,
        "adj": false
    },
    {
        "ref": "1_CertTest4_1_PCD_InvoiceCharge",
        "chg": 1,
        "line": 0,
        "sale": 1,
        "tran": 19,
        "serv": 43,
        "adj": false
    }
] 
```