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French Internet and telecom operator Nerim was founded in 1999 and has gone on to be one of the leading providers, being one of the first to offer ADSL connections in the country. Nerim offers simple, affordable SIP trunking to French 3CX customers, who can now enjoy their PBX with Nerim’s services for a cost-effective and reliable solution.
Reference website: Nerim
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): No
- Catch All Routing: Yes
- Fax T.38 support: No
- CLIR (Number Suppression): No
- DTMF via RFC 2833: Yes
- Codec Order: 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: FR
- Select Provider in your Country: Nerim
- Main trunk number: This will have been provided to you by Nerim. You must enter the number in the national number format (e.g.0123456789)
- Press OK
Since Nerim does not require authentication scroll to the top of the page and press OK. At this point you should see your Nerim Trunk appear as Registered.
Adding Additional DIDs
To associate all other DIDs/Numbers you have in your Nerim account with 3CX, go to the Management Console → SIP Trunks, double-click on your Nerim 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 number format (e.g. 0123456789) 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 Nerim SIP Trunks in 3CX, all numbers should be entered in the national number format (e.g. 0123456789), otherwise call routing will fail.
Outbound Caller ID
Nerim Trunks do not support Clip No Screening which means you can only present numbers associated to your trunk as Outbound Caller ID.
When configuring your Outbound Rules make sure that all numbers are dialed either in the National (e.g. 0123456789) , International (e.g. 0033123456789) or E164 format (e.g. +33123456789). More information about how to create Outbound Rules and how they work can be found here.