Configuring QuestBlue Register Authentication Trunk
Before proceeding with the next steps, ensure that at least one DID has been purchased on the QuestBlue platform.
Create a SIP Trunk on the QuestBlue Platform
To create a new SIP trunk on the QuestBlue platform, follow these steps:
Sign in to your QuestBlue account.
From the left-hand navigation menu, select SIP Trunks > Trunks.
Click Add Trunk.
Enter a friendly name for the trunk (for example,
PortSIP-Trunk).For Trunk Type, select Static IP Trunk.
For Trunk Region, choose the appropriate location.
Note the SBC domain for the selected region. QuestBlue typically recommends using
sbc.questblue.com.
For Max Channels, leave the default value unless your service plan requires a different setting.
In the IP Address field, enter the public static IP address of your PortSIP PBX, then click Create Trunk.
After the SIP trunk is successfully created, it will appear in the SIP Trunks > Trunks list in your QuestBlue account and will be ready to use in PortSIP PBX configuration.
Retrieve the Trunk Password
To retrieve the password for a SIP trunk on the QuestBlue platform, follow these steps:
Go to the Trunks list page.
Click the Edit (pencil) icon next to the trunk.
Copy and securely record the trunk password displayed on the configuration page.
Assign a DID to a SIP Trunk
To assign a DID number to a SIP trunk, follow these steps:
Navigate to Telephone Numbers > Telephone Numbers.
All active DID numbers will be displayed.
Click the Edit (pencil) icon next to the DID you want to assign.
In the pop-up window, select the desired SIP trunk from the Trunk drop-down list.
Click Submit to save the changes.
You can repeat these steps to assign additional DIDs as needed.
Configure a Register-Based Trunk in PortSIP PBX
The QuestBlue Registration Trunk corresponds to a Register-Based Trunk in PortSIP PBX.
You can configure a Register-Based Trunk at either of the following levels:
System Administrator level
The trunk can be shared with one or more tenants.
Tenant Administrator level
The trunk can be used only by that tenant and cannot be shared.
Step 1: Create the Register-Based Trunk
Sign in to the PortSIP PBX Web Portal as a System Administrator or Tenant Administrator.
From the left-hand navigation menu, go to Call Manager > Trunks.
Click Add, then select Register Based Trunk.
Step 2: Configure Basic Trunk Settings
Enter the following information:
Name Enter a friendly name for the trunk (for example,
QuestBlue-Reg-Trunk).Brand Select QuestBlue.
DID Pool (Tenant Admin level only) If you are configuring this trunk at the Tenant Administrator level, specify the QuestBlue DID numbers assigned to this tenant.
The tenant can use only the DID numbers in its DID pool to:
Create inbound and outbound call rules
Configure outbound caller IDs for extensions
DID Pool Format Examples
The DID pool may include a single number, multiple numbers, ranges, or a combination. Use a semicolon to separate them:
Click Next to continue.
Step 3: Configure Trunk Credentials
Enter the credentials provided by QuestBlue:
Authentication Name Enter the QuestBlue trunk username specified when creating the SIP trunk on the QuestBlue platform (for example,
portsipRegUser).Password Enter the trunk password retrieved earlier from the QuestBlue platform.
Click Next to continue.
Step 4: Configure Call Capacity and Options
Max Concurrent Calls Specifies the maximum number of simultaneous calls that PortSIP PBX can establish using this trunk.
Adjust this value based on your QuestBlue service plan and expected call volume.
For most deployments, the default value is sufficient.
Leave all other settings at their default values unless you have specific requirements.
Click Next to continue.
Step 5: Assign Tenants and DID Pool (System Admin level only)
❗Note This step is available only when configuring the Register-Based Trunk at the System Administrator level.
Assign the trunk to one or more tenants.
Provide QuestBlue DID numbers to each tenant using the DID Pool.
❗Important
Each DID can be assigned to only one tenant.
A tenant can use only the DID numbers in its assigned DID pool to:
Create inbound and outbound call rules
Configure outbound caller IDs for extensions
DID Pool Format Examples
Click OK to save the configuration.
Expected Result
The trunk configuration is now complete.
Once PortSIP PBX successfully registers to the QuestBlue platform, the trunk status will display Registered on the trunk list page.
You can now proceed to configure inbound and outbound call routing rules using the QuestBlue Register-Based trunk.
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