How to Install & Setup Free PBX SIP Trunking

[su_howto_introduction text=”setting up Free PBX SIP Trunking with Circuit ID”] [su_howto_steps]

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Follow the How to Purchase Phone Numbers guide to purchase one (1) or more numbers.

Login to the Free PBX admin panel.
Go to the Connectivity >> Trunks >> Add SIP (chan_sip) Trunk as shown in Exhibit 1.
Click on the Add SIP (Chan_sip) Trunk to add a new Gateway and enter the following information as shown in Exhibit 2:
- General Settings
  - Trunk name: CircuitID
  - Outbound Caller ID: The default outbound caller ID. Note that the caller ID can be overwritten on a per extension basis.
- Outgoing Settings: (Note: The information after the semicolon (;) is considered a comment and must be deleted for the trunk to work properly on some PBX versions.)
- canreinvite=nonat
- nat=yes
- context=from-trunk
- host=g.pstn.circuitid.com
- username=NA
- fromuser=NA
- secret=**** (NA)
- type=peer
- disallow=all
- allow=ulaw
- ; allow=g729 ; uncomment if you purchased g.729 from Digium
- trustrpid=yes
- sendrpid=yes
- insecure=invite
- qualify=yes

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To create inbound routes, go to Connectivity, then click Inbound Routes.
Next, add an incoming route for each number you purchased in step 3 of this articles as follows:
- Description: Provide a meaningful description of what this incoming route is.
- DID number: Enter the phone number you purchased in Step 3.
- Set Destination: Set the destination that will receive calls when this number is dialed.
- Click Submit to save your route.
Finally, click on “Apply config” to commit your changes to the server.