To start making outbound calls first you need to authenticate your VoIP-platform. The easiest way to do so is by adding the IP-address of your VoIP platform or creating an account in our Dashboard.
When you are logged in to our Dashboard, click on Voice icon in the left-hand menu and select SIP Trunking.
You can now fill in your details in just 2 steps explained below, or watch our video tutorial:
Step 1: Add an ACL
The first step is to create an Access Control List (ACL). An ACL is used to define which IP-addresses and/or username-password accounts are allowed to make use of your account. To manage the authentication of your VoIP infrastructure you can create multiple ACL’s, each with one or more accounts.
On the top menu click on the 'Access Control' tab → 'Add New' button.
Name each ACL in a new pop-up window so you can easily recognize them.
After saving the ACL, it will appear in the overview in the left-hand menu.
When you click the ACL name you'll see a new screen where you can add IP-addresses and/or username-password accounts.
If an ACL contains at least 1 IP-address and 1 account they both need to be used in the SIP-INVITE header. The SIP-INVITE header is used to set-up a VoIP call and contains typically between 4 and 6 header entries with contact information.
Below you find an example of a FROM field as part of SIP-INVITE header with username 31000000:
SIP from address: sip:31000000@[yourdomain].sip.eu1.messagebird.com;transport=UDP
Step 2: Add a Subdomain
The second step is to create a subdomain. A subdomain is a personal DNS name inside the Messagebird.com domain, for example, yourcompany.sip.messagebird.com. Only calls to this specific subdomain will be authenticated by the attached ACL’s.
To add a subdomain, in the top menu click on the 'SIP Trunks' tab → 'Add New' button.
You'll a pop-up screen where you can insert your own subdomain name.
The field 'Domain' is the address used for your SIP-communication. A valid domain name contains:
- Minimum of 1 character
- Valid characters range from 0-9, a-z and A-Z
After creating a Domain you can attach an ACL to this Domain by selecting the domain in the left-hand menu and clicking on 'Attach Access Control List'. You can select the preferred ACL to attach to this domain in a pop-up window.
Select the right ACL and save your choice. On the SIP Trunks page, you’ll find an overview of the ACLs attached to this particular domain.
Don't forget that:
- A domain can have multiple attached ACLs
- An ACL can be attached to multiple domains
Now you are ready to place calls from your VoIP platform to our SIP servers. Please be aware that only accounts attached to this domain can place calls. Therefore the full domain name should be used in the SIP-INVITE header.
Below is an example of an SIP-INVITE header: