On this topic
HostProfis has been providing its high quality solutions for business customers in Austria since 1999. They now provide their services, including internet, telephony, hosting and SIP trunks, to over 45,000 customers. The HostProfis SIP trunk can now be easily selected from within the management console.
Reference website: HostProfis
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 v15.5 SP6
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 T.38 support: Yes
- CLIR (Number Suppression): Yes
- DTMF via RFC 2833: Yes
- Codec Order: G729, G711A, G711U
- 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
Go to “SIP Trunks” and select “Add SIP Trunk”
- Select Country: AT
- Select Provider in your Country: HostProfis
- Main trunk number: This will have been provided to you by HostProfis. You must enter the number in the international number format (e.g. 43123456789)
- Press “OK”
Under the “General” tab in the “Trunk Details” enter the registrar, and in the “Authentication” section your Authentication ID and Password (these will be supplied to you by HostProfis).
Once you have filled in these fields as given to you by HostProfis, scroll to the top of the page and press OK. At this point if you refresh the page you should see your HostProfis Trunk appear as “Registered”.
Adding Additional DIDs
To associate all other DIDs/Numbers you have in your HostProfis account with 3CX, go to the Management Console → SIP Trunks, double-click on your HostProfis 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 a international number format (e.g. 43123456789) and press “OK”.
Creating Inbound Rules
Now that you have associated all your DIDs/Numbers with your 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 HostProfis SIP Trunks in 3CX, all numbers should be entered in international number format (e.g. 43123456789), otherwise call routing will fail.
Outbound Caller ID
HostProfis Trunks support Clip No Screening which means you can present any number as Outbound Caller ID. For this to work however, the number must be presented in the international number format (e.g. 43123456789).
When configuring your Outbound Rules make sure that all numbers are dialed either in the National (e.g. 0123456789) or International (e.g. 0043123456789) format. More information about how to create Outbound Rules and how they work can be found here.
3CX Inbound Fax Server
HostProfis does support T.38 for Inbound Faxes and can work with the 3CX in-built Fax Server. In order for it to work more reliably however, you must first make some adjustments:
- Log into you 3CX Management Console
- Go to Settings → Parameters
- Search for parameter ‘T38_BITRATE’
- Double-click on this parameter and change the value to 4800, then press OK.
- Go to Dashboard → Services, highlight the IVR Server and press the Restart button.
Configuring an ATA with a FAX Extension for Outbound Faxing
The general instructions on how to configure an ATA/FXS Gateway with can be found here. For Outbound Faxes to work using your HostProfis SIP Trunk however, you must ensure that Fax Transmission mode is set to G711a. An example is shown using a Grandstream FXS Gateway in the following screenshot.