# Check SMPP ESME trunk connection status

Check whether your application is bound to the DIDWW SMSC with an SMPP ESME
trunk. The status shows the bind that your application establishes. Checking
it does not connect or bind your application.

## Before you begin

- An active DIDWW account is required. [Sign in to DIDWW](https://my.didww.com/users/sign_in).
- An SMPP ESME trunk is required. If you do not have one, see [Create an
  SMPP ESME trunk](create-smpp-esme-trunk.html).
- Your application must be configured to bind with the trunk's credentials.
  See [Bind an SMPP ESME trunk](bind-smpp-esme-trunk.html).

## Step 1: Open the status window

1. In the DIDWW User Panel, go to **SMS > SMS Trunks**.
2. Locate the SMPP ESME trunk and click the **Actions** button next to it.
3. Select **Check Status**.

[![Actions menu of an SMPP ESME trunk with Check Status highlighted](../../../../_images/check_status.png)](../../../../_images/check_status.png)


**Fig. 1.** Open the status window

## Step 2: Review the connection status

The **Status Information** window shows the current bind of the trunk.

| Field | Description |
| --- | --- |
| Status | **Not connected** if no application is bound. While your application is bound, the bind type, for example `BIND_TRX` for a transceiver bind or `BIND_TX` for a transmitter bind. |
| Sent, Received, Pending | Message counters for the current bind. |
| Type | Bind type, for example `TRX` (transceiver) or `TX` (transmitter). |
| System ID | System ID that your application bound with. |
| Connected | Date and time when the current bind was established. |
| Online | How long the current bind has been active. |
| Connection | IP addresses and ports of the DIDWW SMPP server and your application. |

[![Status Information window of an SMPP ESME trunk showing Status BIND_TRX, Sent, Received, Pending, Type TRX, System ID, Connected, Online, and Connection](../../../../_images/status_information.webp)](../../../../_images/status_information.webp)


**Fig. 2.** Review the connection status

## Next steps

- If the trunk is not connected, check the bind parameters, the trunk's
  **Allowed IP addresses**, and your firewall. See [Bind an SMPP ESME
  trunk](bind-smpp-esme-trunk.html).

## Related resources

- [Server locations and IP addresses](../../technical-data/smpp-specification.html#smpp-endpoints) - Look up the
  hostname and IP address of each DIDWW SMPP server location.
- [Inbound SMS logs](../../../../logs-analytics/sms-logs/inbound-logs.html#inbound-logs) - Review inbound SMS delivered
  through your SMS trunks.
- [Outbound SMS logs](../../../../logs-analytics/sms-logs/outbound-logs.html#outbound-logs) - Review outbound SMS sent from
  your account.
- [SMPP ESME trunk](../smpp-esme-trunk.html) - Understand how your
  application connects to DIDWW and exchanges messages.