EWE TEL Business
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About EWE TEL
EWE TEL GmbH is a German SIP Trunk provider and is one of the biggest regional providers of telecommunications services in Germany. As a 100 per cent-subsidiary of EWE AG, EWE TEL offers end users and business customers in northwest Germany high-speed internet, fixed line- and mobile communications.
Reference website: EWE TEL
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 SP5
Below is a short overview of the provider's capabilities and services and whether they’re supported or not:
- CLNS (Clip No Screening): Yes - provided as a separate service by EWE TEL
- Catch All Routing: Yes
- Fax T.38 support: No
- CLIR (Number Suppression): Yes
- DTMF via RFC 2833: Yes
- Codec Order: G711U, G711A, 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
Go to “SIP Trunks” and select “Add SIP Trunk”
- Select Country: DE
- Select Provider in your Country: EWE TEL
- Main trunk number: This will have been provided to you by EWE TEL. You must enter the number in the E.164 number format (e.g. +495114740240)
- 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 EWE TEL).
Once you have filled in these fields as given to you by EWE TEL, scroll to the top of the page and press OK. At this point if you refresh the page you should see your EWE TEL Trunk appear as “Registered”.
Adding Additional DIDs
To associate all other DIDs/Numbers you have in your EWE TEL account with 3CX, go to the Management Console → SIP Trunks, double-click on your EWE TEL 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 E.164 number format (e.g. +495114740240) and press OK once you have finished.
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 EWE TEL SIP Trunks in 3CX, all numbers should be entered in the E.164 number format (e.g. +495114740240), otherwise call routing may fail.
Outbound Caller ID
EWE TEL Trunks support Clip No Screening as a separate paid service. This means that without this extra service enabled, when making outbound calls you can only present numbers you have associated with your account as Outbound Caller ID.
To enable Clip No Screening, you must come in contact with your EWE TEL representative to have it enabled for you.
Once this service is enabled, you can present any number as outbound caller ID, not only numbers you have associated with your account.
When configuring any field in 3CX that affects the Outbound Caller ID, the number you want to present as CLI must be entered in the E.164 dialing format (e.g. +495114740240).
When using EWE TEL to make outbound call, the dialed number can be in any valid National or International number format.
More information about how to create Outbound Rules and how they work can be found here.