> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dialtu.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Configuration

> Channel, schedule, behaviour, memory and outcomes

## SMS channel

<Info>
  **📷 Screenshot needed** — the SMS Channel group expanded, with number, type and routing.

  Save to `/images/en/sms-agents/channel-group.png`
</Info>

### Agent type

| Type         | What it does                                                    |
| ------------ | --------------------------------------------------------------- |
| **Inbound**  | Answers incoming texts on a dedicated number; never texts first |
| **Outbound** | Starts conversations by texting first                           |

<Warning>
  With Lumina, choose **Inbound**. An outbound agent will save, but won't be able to start
  conversations.
</Warning>

### Time-based routing

Inbound agents only. Defines the windows it covers, with up to **4 ranges per day**, or marks
it as the number's **default agent**.

* Ranges are evaluated in the **agent's timezone**.
* Windows are **half-open**: at exactly 17:00, a 09:00–17:00 agent is off duty and a
  17:00–21:00 agent is on. That way adjacent windows tile the week without overlapping.
* A range that ends before it starts **wraps past midnight**.

<Warning>
  **SMS routing is by schedule only.** There are no tag audiences: two agents on the same number
  can't share even a minute of the week. Any overlap is a conflict and blocks the save.
</Warning>

<Warning>
  If the number has **no default agent**, messages outside scheduled hours **aren't routed to
  anyone**.
</Warning>

## Conversation behaviour

Only **two** controls:

| Control                | Range        | Default | What it does                                      |
| ---------------------- | ------------ | ------- | ------------------------------------------------- |
| **Inactivity timeout** | 2 – 1440 min | 60 min  | Auto-ends the chat after this much user silence   |
| **Auto Close Message** | text         | empty   | Sent when the conversation closes from inactivity |

<Note>
  There is no **response length** control, no **conversation style**, no **message batching**,
  and no reply-delay setting. All of that is defined by writing it into the prompt.
</Note>

<Tip>
  Since there's no length control, put an explicit limit in the prompt rules: *"Two sentences per
  message, maximum."*
</Tip>

## AI Memory

Works the same as WhatsApp, and **Lumina does receive it**.

| Setting                           | Default   |
| --------------------------------- | --------- |
| **Use memory**                    | Off       |
| **How the agent gets the memory** | Automatic |
| **Deep recall**                   | Off       |
| **Record to memory**              | **On**    |

<Warning>
  **Reading is opt-in; writing is on by default.** If you've never opened this section, your
  agent is already contributing what it learns to the contact's shared memory.
</Warning>

The **Configure** modal defines what it records: **Facts**, **Preferences**, **Open items** and
**Milestones**, plus a **business context** and a **Never record** list — a hard exclusion for
card numbers, ID documents or health data.

<Card title="Contact memory" icon="brain" href="/en/whatsapp-agents/memory">
  The full explanation of how memory works. It applies equally to SMS.
</Card>

## Outcomes

Disposition tags classify the conversation when it closes. On SMS all five types are available:
Standard, Retry, Interested, Not Interested and Voicemail.

<Note>
  The **Analysis Prompt** field is badged *Aurora Only*: on a Lumina agent it's saved but not
  used for classification.
</Note>

## Testing

The editor's test panel lets you talk to the agent before exposing it.

<Warning>
  As on the other channels, **API and integration tools run for real**. Use test data.
</Warning>

## Next step

<Card title="Compliance and opt-outs" icon="shield-check" href="/en/sms-agents/compliance">
  STOP, HELP, START and A2P 10DLC registration.
</Card>