Flowroute SMS Integration

Before proceeding with the next steps, ensure that you have purchased a DID on the Flowroute platform with SMS enabled.

Important: A2P 10DLC Registration (U.S.)

Compliance Notice Under U.S. regulations (A2P 10DLC – Application-to-Person SMS), SMS-capable phone numbers must be registered with wireless carriers to avoid message blocking or filtering.

  • This requirement applies only to A2P messaging (application-generated messages).

  • It does not apply to P2P (Person-to-Person) messaging.

  • Failure to complete registration may result in:

    • SMS delivery failures

    • Message throttling

    • Complete blocking by carriers

Follow Flowroute’s official guide to complete A2P 10DLC registration before enabling SMS in PortSIP PBX.

Obtain Integration Details from Flowroute

PortSIP PBX requires API credentials from Flowroute to enable SMS/MMS integration.

Step 1: Create an API Key

  1. Log in to the Flowroute Portal.

  2. From the top menu, select Preferences.

  3. Open the API Control tab.

  4. Enter a name for your API key.

  5. Click Add New to create the API key.

Step 2: Obtain the Access Key and Secret Key

  1. After creating the API key, remain on the API Control page.

  2. Locate the newly generated credentials.

  3. Copy and securely store the following values:

    • Access Key

    • Secret Key

Security Best Practice Treat the Access Key and Secret Key as sensitive credentials. Do not expose them publicly or store them in plaintext files.

Configure SMS with Flowroute Trunk in PortSIP PBX

This section explains how to configure SMS messaging in PortSIP PBX using a Flowroute SIP trunk.

Prerequisites

Before configuring SMS in PortSIP PBX, ensure that:

Sign in to the PortSIP PBX Web Portal

You can sign in using one of the following methods:

  • System Administrator

    • Sign in as a PBX System Administrator.

    • Navigate to Tenants.

    • Select the tenant and click Manage to switch into that tenant.

  • Tenant Administrator

    • Sign in directly as a Tenant Admin to manage the tenant.

Note For more details, see Tenant Management.

Add an SMS Configuration in PortSIP PBX

Step 1: Create the SMS Configuration

  1. In the PortSIP PBX Web Portal, navigate to: Message Channel > SMS/MMS

  2. Click Add.

  3. Select your configured Flowroute Trunk.

  4. Configure the following fields:

    Sender ID

    • Enter the Sender ID created on the Flowroute platform if you want to use a custom sender.

    • Leave this field empty to use the DID associated with the Flowroute trunk as the Sender ID.

    Access Key

    • Enter the Access Key obtained from Flowroute.

    Secret Key

    • Enter the Secret Key obtained from Flowroute.

  5. Click OK to save the configuration.

Step 2: Copy the PortSIP PBX Webhook URL

Inbound SMS messages are delivered to PortSIP PBX through a webhook.

  1. On the Message Channel > SMS/MMS list page, select the SMS configuration you just created.

  2. Click Copy Webhook, or

  3. Double-click the configuration and manually copy the Webhook URL.

Configure SMS for a Number in Flowroute

This section explains how to enable SMS for a specific DID in Flowroute and configure SMS webhook callbacks so inbound messages are delivered to PortSIP PBX.

Step 1: Enable SMS for a DID in Flowroute

  1. Log in to the Flowroute Portal.

  2. From the main menu, navigate to: DIDs > Manage

  3. Select the phone number for which you want to enable SMS.

  4. From the Choose a DID Action drop-down list, select Enable Messaging.

Configure SMS Webhook Callbacks

Flowroute delivers inbound SMS messages to your system using webhook callbacks. You can configure the webhook per number or globally, depending on your requirements.

Option 1: Configure a Webhook for a Specific Number

Use this option if you want to receive inbound SMS messages only for selected DIDs.

  1. In the Flowroute Portal, navigate to: DIDs > Manage

  2. Select the DID you want to configure.

  3. Configure the Messaging Webhook URL for that number.

  4. Paste the PortSIP PBX Webhook URL copied from the SMS configuration.

  5. Save the changes.

Use Case

  • Recommended when only certain numbers should deliver SMS to PortSIP PBX.

Option 2: Configure a Global Messaging Webhook (All Numbers)

Use this option if you want to receive inbound SMS messages for all DIDs under your Flowroute account.

  1. In the Flowroute Portal, navigate to the Messaging / Webhooks configuration area.

  2. Configure the Global Messaging Webhook URL.

  3. Paste the PortSIP PBX Webhook URL.

  4. Save the configuration.

Use Case

  • Recommended when all SMS-enabled numbers should be handled by PortSIP PBX.

Verify the Configuration

At this point, the Flowroute SMS/MMS integration is complete.

You can now create outbound and inbound rules in PortSIP PBX to send and receive SMS/MMS messages using the Flowroute, just as you would configure rules for voice calls.

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