Voxtelesys - SIP Trunk
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Voxtelesys offers advanced voice, data, routing and compliance services as well as exceptional customer service all at a low cost. They deliver a reliable trunk availability that is changing the on-size-fits-all service bundles that offer too little and cost too much.
Reference website: Voxtelesys
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 SP3
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: G711U, G711A, G729
- NAT Support: Yes
- 302 Diversion 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: US
- Select Provider in your Country: Voxtelesys
- Main trunk number: This will have been provided to you by Voxtelesys. You must enter the number in the 10-digit number format (e.g. 8135910130)
- Press OK
Under the “General” tab, first fill in the “Registrar” field in the “Trunk Details” section. After in the “Authentication” section, enter your Authentication ID and Password.
These values will have been provided to you by Voxtelesys.
Once you have filled in these fields as given to you by Voxtelesys, scroll to the top of the page and press OK. If you refresh the page you should see your Voxtelesys Trunk appear as Registered.
Adding Additional DIDs
To associate all other DIDs/Numbers you have in your Voxtelesys account with 3CX, go to the Management Console → SIP Trunks, double-click on your Voxtelesys 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 10-digit number format (e.g. 8135910130) 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 Voxtelesys SIP Trunks in 3CX, all numbers should be entered in a 10-digit number format (e.g. 8135910130), otherwise call routing may fail.
Outbound Caller ID
Voxtelesys SIP Trunks do not support Clip No Screening which means you cannot present any number you want when calling outbound.
Only DID’s that exist on the trunk can be sent, not numbers from a 3rd party. To do this you will need to format the DDI in a 10-digit number format (e.g. 8135910130) under the “Outbound Caller ID” of the individual extension.
When using Voxtelesys, outbound calls can be made using any valid US number format. This means that when configuring your Outbound Rules you can have users dial either using 10-digit or 11-digit format.
More information about how to create Outbound Rules and how they work can be found here.