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

# Add PAX Devices in Taliup HQ

> Register PAX terminals as Devices in Taliup HQ using the TID from PaxStore. Device registration is required before the first login on the terminal.

After creating terminals in PaxStore and noting each **TID**, register each terminal as a **Device** in Taliup HQ. Taliup POS uses the device TID to request the list of assigned users from Taliup HQ — device registration must be complete before staff log in on the terminal for the first time.

## How many device records do I need?

| Device                       | Device records to create                                                            |
| ---------------------------- | ----------------------------------------------------------------------------------- |
| **PAX Elys** (L1400 + A3700) | Two — one for the L1400 (cashier terminal) and one for the A3700 (customer display) |
| **PAX A920 Pro**             | One — for the A920 Pro                                                              |

<Warning>
  For PAX Elys, both the L1400 and A3700 TIDs must be registered in Taliup HQ **before** opening Taliup POS on the L1400 for the first time. Logging in before device registration is complete will cause the login screen to show no users.
</Warning>

## Steps

<Steps>
  <Step title="Open the Entity">
    In Taliup HQ, click **Entities** in the sidebar, find the merchant's Entity, and click **Manage**.
  </Step>

  <Step title="Open the Devices tab">
    Click the **Devices** tab.
  </Step>

  <Step title="Create a new Device">
    Click **+ Create Device**.
  </Step>

  <Step title="Enter the device details">
    Fill in the required fields:

    * **Device Name** — a descriptive name for this terminal (for example, "Front Register" or "L1400 Cashier").
    * **Device Type** — select the correct device type for this terminal.
    * **TID** — enter the TID from PaxStore for this terminal.
    * Complete any remaining required fields.
  </Step>

  <Step title="Save">
    Click **Create Device** (or **Save**) to register the device.
  </Step>

  <Step title="Repeat for additional terminals">
    For PAX Elys, repeat steps 3–5 to create a second device record for the A3700 using its TID from PaxStore.
  </Step>
</Steps>

<Frame caption="The Create Device form in Taliup HQ, with the TID field highlighted.">
  <img src="https://mintlify.s3.us-west-1.amazonaws.com/taliup/images/taliup-hq/create-device.png" alt="Create Device form in Taliup HQ showing Device Name, Device Type, and TID fields, with the TID field highlighted" />
</Frame>

## Troubleshooting

| Problem                                                 | What to try                                                                                                                                                                                                                           |
| ------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| No users on login screen / cannot log in on first setup | Confirm the terminal TID exists in PaxStore and a matching Device record exists in Taliup HQ before opening Taliup POS. Confirm the Entity has assigned users (an Employee user is created automatically when the Entity is created). |
| Demo Mode passcode rejected                             | Confirm the passcode with your ISO, confirm the terminal has internet access, and confirm the terminal TID is registered in Taliup HQ.                                                                                                |
| Terminal keeps logging out with 503 errors              | The marketplace subscription may have expired. Renew the subscription in PaxStore or use Demo Mode.                                                                                                                                   |
| Merchant locked out of Taliup POS                       | An ISO Administrator may have disabled the merchant's **Location** in Taliup HQ. Re-enable the location under **Settings → Locations**.                                                                                               |

## What's next

With devices registered, configure the merchant's payment settings in Taliup HQ.

* [Plans & Features →](/taliup-hq/onboarding/plans-features)
* [Tips →](/taliup-hq/onboarding/tips)
* [Locations →](/taliup-hq/onboarding/locations)
* [Virtual Terminal →](/taliup-hq/onboarding/virtual-terminal)