1. Log in to the Manager Portal
2. Navigate to SIP Trunks
   
3. Click Add SIP Trunk
   
4. Under the Basic tab, complete the following information:
   • Name: Must be unique, all lower case letters, no spaces or special characters, minimum of 4 characters
     • Note: You may use the name of the domain. (i.e. Domain name of "domain2.12345.service", name the SIP Trunk "domain2.12345.service")
   • Domain: Client's domain name or public IP of the PBX
   • Description: Company Name
   • Relay Media:  Usually set to Don't care, but this will depend on the PBX or ATA requirements
   • Trunk Type: Select Bidirectional (Inbound & Outbound), Origination Only (Inbound Only), Termination Only (Outbound Only), or Locked (No Inbound or Outbound)
   • IP Control: Choose Static IP or Require Registration. This will depend on the PBX or ATA Requirements
     • If using Static IP, enter the IP address of the PBX
     • If using Require Registration, enter a unique username (not a DID). These credentials will be used for registering the PBX or ATA
5. Click Next
   
6. Under Dial Planning & Limits, complete the following fields:
   1. Dial Translation: This should be left as the domain name
   2. Dial Permission: Recommended permission is US & Canada
   3. Set the limitations you wish to use for inbound & outbound calls, or both
7. Click Add
   
8. If desired, configure failover for the sip trunk
9. Configure static E911 addressing for the SIP trunk's number (https://voipdocs.io/e-911/register-e911-from-manager-portal?from_search=145177188)

SIP Trunk Best Practices

1. As noted above, we recommend that the name be the same as the Domain name
2. In the Portal, navigate to the Inventory page and you can assign numbers to the SIP trunk shown below:
   
3. Sample SIP Trunk setup:
   1. Name — The Trunk ID, we recommend the Domain name to be used (domain.12345.service)
   2. Domain —  The domain to associate with the trunk (domain.12345.service)
   3. Description —  A string that defines, or otherwise notates, who or what the trunk is for
   4. Relay Media — Allows video content to be relayed, if yes.
   5. Trunk Type — The type of calling that can occur on the trunk (bidirectional, inbound, outbound, none)
   6. IP Contro — Require Registration when using registration, IP Control when using the peer IP
   7. SIP User — username for SIP registration
   8. SIP Password — password for SIP registration