Configuring COM.com IP Authentication Trunk
Before proceeding with trunk configuration, ensure that you have purchased at least one DID on the CM.com platform.
CM.com Setup Guide
To enable inbound calling, you must first complete the required configuration on the CM.com platform.
Sign in to your CM.com account.
Follow the CM.com guide to configure inbound DIDs: How do I configure a DDI for incoming calls?
Confirm that the DID is active and ready for SIP trunking.
Once completed, continue with the trunk configuration in PortSIP PBX.
Configure a CM.com IP Authentication Trunk in PortSIP PBX
You can configure CM.com as an IP-Based Trunk at the system administrator level. After configuration, this 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.
Navigate to Call Manager > Trunks.
Click Add, then select IP Based Trunk.
Step 2: Enter Trunk Details
Configure the trunk with the following settings:
Name: Enter a friendly name for the trunk (for example,
CM.com SIP Trunk)Brand: Select CM.com
Hostname or IP Address: 178.22.58.10
Click Next to continue.
Step 3: Configure Trunk Options
Max Concurrent Calls Set the maximum number of concurrent calls allowed on this trunk. Adjust this value based on your CM.com subscription and expected traffic.
❗Recommendation Keep the default values for other options unless you have specific requirements.
Click Next to continue.
Step 4: Assign the Trunk to Tenants and Configure the DID Pool
Assign the trunk to one or more tenants.
Configure the DID Pool(DID numbers) using the CM.com DIDs you purchased.
❗Important
A DID number can be assigned to only one tenant.
A tenant assigned to this trunk can:
Use only the DID numbers defined in the DID Pool
Create inbound and outbound routing rules based on the assigned DID numbers
Configure outbound caller IDs for extensions using the assigned DID numbers
DID Pool Format Examples
The DID Pool can include a single number, multiple numbers, or number ranges, separated by semicolons.
For example:
Step 5: Save the Configuration
Click OK to save the trunk configuration.
Expected Result
The CM.com IP-based trunk is successfully created.
The trunk status displays Registered (IP-Based Trunks always show “Registered” in PortSIP PBX).
Assigned tenants can immediately use the configured DIDs for inbound and outbound calls.
❗Note Ensure that CM.com allows traffic from your PBX IP address when using IP authentication.
Now you can follow the article on Configuring inbound and outbound calls.
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