SIP Trunk Technical Details
Everything your IP device needs to connect, plus how to whitelist your IP and route numbers to your trunk.
Base Requirements
We support any IP device with the following attributes.
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IP Whitelisting (Direct-IP Setup)
Send calls directly from your PBX, SBC, or server to PBXme without registering to a SIP device — recommended if you have a static public IP.
Navigate to IP Settings
Go to My Account → IP Settings from the top menu.
Create a Whitelist Entry
On the IP Whitelist page, click Create to add a new entry.
Fill in the IP Details
Name — a label for your reference (e.g. “Outgoing PBX”). IP — your server’s public IP (e.g. 5.6.7.8; use /32 for a single host). Prefix (optional) — a short numeric code to differentiate traffic if multiple users share the same IP. X-Header (optional) — a custom SIP header used for the same purpose.
Save and Verify
Click Save. The IP appears in the list showing the IP, Prefix, X-Header, and creation date. Calls from the whitelisted IP are then accepted automatically.
Notes: a single account can whitelist several IPs if calls may originate from different servers. If an IP is already used by another account, you must define a unique Prefix or X-Header so PBXme can identify which account each call belongs to.
Connecting a Number to Your Trunk
Point an inbound local number at your trunk’s IP.
Open the Number’s Call Forward Settings
From Inbound → Local Numbers, click the Call Forward arrow button next to the number you want to connect.
Select Direct-IP
In the popup that appears, select Direct-IP as the forwarding destination.
Enter Your WAN IP and Save
Type the WAN IP of your SIP trunk and press Save. Incoming calls to that number are now delivered directly to your trunk.
Glossary
WhitelistA list of IPs authorized to connect directly to PBXme. | Direct IPMethod of sending calls without SIP registration credentials. |
PrefixA short numeric code prepended to dialed numbers to identify the account. | X-HeaderA custom SIP header that identifies the traffic source account. |
/32Indicates one single IP address (e.g. 5.6.7.8/32). | |
Explore More
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Frequently Asked Questions
What ports need to be open for the SIP trunk?
Ports 10000–20000 (UDP) and port 5060 (UDP) must be open between your IP address and our network.
Can I connect without SIP registration?
Yes — using IP Whitelisting (Direct-IP), recommended if you have a static public IP. Add your IP under My Account → IP Settings.
What if multiple accounts send calls from the same IP?
Each account must use a unique Prefix or X-Header on its whitelist entry so PBXme can identify which account each call belongs to.
How do I route an incoming number to my trunk?
From Inbound → Local Numbers, use the Call Forward arrow on the number, select Direct-IP, and enter your trunk’s WAN IP.
Ready to Connect?
Check your IPBX compatibility free, then connect via SIP registration or IP whitelisting.