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How to Set Up a SIP Trunk in FreePBX with IPComms

FreePBX makes SIP trunk configuration easy with its web-based GUI. This guide walks you through creating a PJSIP trunk, configuring outbound and inbound routes, and connecting your FreePBX system to IPComms.

FreePBX · January 8, 2026 · Updated September 17, 2026 · 11 min read

Prerequisites

FreePBX 15+ installed and accessible via web browser
An IPComms account with SIP credentials (sign up at portal.ipcomms.net)
At least one DID (phone number) assigned to your account
Your server's public IP address (for IP authentication)
Network access to s1.ipcomms.net on ports 5060 (UDP) and 10000-20000 (UDP)

Step 1: Create a New Trunk

Log into your FreePBX admin panel (typically http://your-server/admin)

Navigate to Connectivity > Trunks

Click Add Trunk and select Add SIP (chan_pjsip) Trunk

Enter a Trunk Name: IPComms

Step 2: Configure PJSIP Settings

General Tab

Field	Value
Trunk Name	IPComms
Outbound CallerID	Your DID number
CID Options	Allow Any CID

PJSIP Settings Tab - General

Field	Value
Username	Your IPComms username
Secret	Your IPComms password
Authentication	Outbound
Registration	Send
SIP Server	s1.ipcomms.net
SIP Server Port	5060
Context	from-pstn

PJSIP Settings Tab - Advanced

Field	Value
From Domain	Your SIP domain from the welcome email (e.g. yourcompany.s1.ipcomms.net) — recommended. It may be left blank when the SIP Server above is our hostname; it is required if you point the trunk at an IP address.
From User	Your IPComms username
Direct Media	No
Match (Inbound)	34.23.59.14

Building this? Your PBX will need a number

Find a phone number for your trunk

Local numbers $1.50 a month, toll-free $2.00, $1.00 one-time setup. Pick one here and it carries into signup.

Enter an area code, or wait a moment for numbers near you.

More numbers, porting and E911 in the portal

Outbound US and Canada: $0.010 /min
Inbound: $0.009 /min
Local number: $1.50 /mo
Per channel: $0 no set limits

Step 3: Create an Outbound Route

An outbound route tells FreePBX which trunk to use for external calls:

Go to Connectivity > Outbound Routes

Click Add Outbound Route

Route Name: IPComms_Out

Trunk Sequence: Select IPComms

Dial Patterns

Prepend	Prefix	Match Pattern	Description
1		NXXNXXXXXX	10-digit dialing (prepends 1)
		1NXXNXXXXXX	11-digit dialing
	9	1NXXNXXXXXX	9 + number (strips 9)
		911	Emergency

Step 4: Create an Inbound Route

Go to Connectivity > Inbound Routes

Click Add Inbound Route

Description: Main Number

DID Number: Enter your IPComms DID (e.g., 2125551234)

Set Destination: Choose where calls should go (IVR, Ring Group, Extension, etc.)

Step 5: Test Your Configuration

Verify Trunk Registration

Asterisk CLI

# Check PJSIP registration
asterisk -rx "pjsip show registrations"
# Expected output:
# IPComms/sip:s1.ipcomms.net    Registered

Test Outbound

Pick up an extension on your FreePBX system
Dial an external number (your cell phone)
Verify the call connects and audio works both ways
Check caller ID shows your DID

Troubleshooting

Problem	Solution
Trunk shows "Unavailable"	Check credentials, verify firewall allows UDP 5060
One-way audio	Set Direct Media to No, check RTP ports
Outbound calls fail	Check outbound route dial patterns
Inbound calls not routing	Verify DID matches exactly in inbound route

Stop worrying about SIP trunk capacity. We have you covered.

SIP trunking from a US carrier since 2002: $0.009 per minute inbound, $0.010 outbound, numbers from $1.50 a month, $0 per channel, no contracts.