Configuring QuestBlue IP 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.
Assign a DID to a SIP Trunk
To assign a DID number to a SIP trunk on the QuestBlue platform, follow these steps:
Sign in to your QuestBlue account.
Navigate to Telephone Numbers > Telephone Numbers.
All active DID numbers will be displayed in the list.
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 to the same or different SIP trunks as needed.
Configure the IP Authentication Trunk in PortSIP PBX
The QuestBlue IP Authentication Trunk corresponds to an IP-Based Trunk in PortSIP PBX.
❗Note IP-Based Trunks must be configured at the System Administrator level. Once created, the trunk can be shared with one or more tenants.
Step 1: Create the IP-Based Trunk
Sign in to the PortSIP PBX Web Portal as a System Administrator.
From the left-hand navigation menu, go to Call Manager > Trunks.
Click Add, then select IP Based Trunk.
Step 2: Configure Basic Trunk Settings
Enter the following information:
Name Enter a friendly name for the trunk (for example,
QuestBlue-IP-Trunk).Brand Select QuestBlue from the Brand drop-down list.
Hostname or IP Address Enter the QuestBlue SBC domain noted earlier when creating the SIP trunk on the QuestBlue platform, for example: sbc.questblue.com
Click Next to continue.
Step 3: Configure Call Capacity
Max Concurrent Calls Defines the maximum number of simultaneous calls that PortSIP PBX can establish through 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 options at their default values unless you have specific requirements.
Click Next to continue.
Step 4: Assign Tenants and DID Pool
Assign this 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 assigned to this trunk 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 can include a single number, multiple numbers, ranges, or a combination. Use a semicolon to separate them:
Click OK to save the configuration.
Expected Result
The trunk configuration is now complete.
In the trunk list, the status will display Registered.
This is expected behavior for IP-Based Trunks, which always show a Registered status.
You can now proceed with configuring inbound and outbound call routing rules using the QuestBlue trunk.
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