Internetport - SIP Trunking
On this topic
Internetport is a Swedish I.T. provider with over 10 years of experience in broadband solutions, IP telephony, server hosting and more. Their low cost and reliable SIP trunking service in combination with 3CX makes for a great communications solution for our Swedish customers.
Reference website: Internetport
Before configuring the SIP trunk it is required to go through the following checklist and make changes where necessary:
- NAT (when used) created to 3CX
- Firewall Checker passed
- Firewall SIP ALG checked and if present disabled
Further setup information can be found in our Academy: 3CX Academy Basic course
Some providers gained support and compatibility with 3CX on a specific product version. It is advisable to always run the latest version of 3CX to ensure ongoing compatibility.
Minimum 3CX Version: 3CX Phone System 15.5
Below is a short overview of the provider's capabilities and services and whether they’re supported or not:
- CLNS (Clip No Screening): Yes
- Catch All Routing: Yes
- Fax in T38: No
- Fax in G711: Yes
- CLIR (Number Suppression): Yes
- DTMF via RFC 2833: Yes
- Codec Order: G711A, G711U, G729
- NAT Support: Yes
Configuring the Trunk with 3CX
The general instructions outlining how to add a new SIP Trunk to your 3CX installation can be found here.
Adding the Trunk
In the 3CX Management Console go to “SIP Trunks” and press the “Add SIP Trunk” button. Here select “SE” from the country drop-down and then select “Internetport”. Then in the ”Main Trunk No” field enter one DID numbers that is associated with your Internetport SIP Trunk . Note that the ”Main Trunk No” must be written in the National number format, e.g. 0xxxxxxxxx. Once you have filled this in, press OK.
This will take you to the SIP Trunk settings. In the “General” tab you now need to fill in 2 fields in the “Authentication” section with the information given to your from your Internetport representative. These fields are:
- “Authentication ID”
- “Authentication Password”
After doing this, scroll to the top of the page and press OK to create the SIP Trunk in 3CX. At this point your Internetport Trunk should be registered.
Adding Additional DIDs
To associate all other DIDs/Numbers you have been given from Internetport with 3CX, go to the Management Console → SIP Trunks, double-click on your Internetport Trunk and go to the “DIDs” tab.
Here you should already see 1 entry that is the Main Trunk number you have set. Add all other DIDs/Numbers you have to the list in the National format, e.g. 0xxxxxxxxx, then press OK once you have finished.
Creating Inbound Rules
Now that you have associated all your DIDs/Number with your Internetport SIP Trunk in 3CX, you can create Inbound Rules to set where calls will be routed when those numbers are called. Instructions on how to create Inbound Rules can be found here.
When configuring Internetport SIP Trunks in 3CX, all numbers should be entered in a National format, e.g. 0xxxxxxxxx, otherwise calls will be rejected.
Outbound Caller ID
Internetport SIP Trunks support Clip No Screening which means you can present any number you want when calling outbound as a Caller ID. The Number format when filling in the Outbound Caller ID fields in 3CX is recommended to be in National format (0xxxxxxxxx), although Internetport will also accept International format as well (46xxxxxxxxx).
There are no special instructions regarding Outbound Rules that are required, numbers can be dialed in any valid number format.
More information about how to create Outbound Rules and how they work can be found here.