Create a trunk under BYOC Premises

Genesys Cloud recommends that you rely on the default settings described in this article. However, if after you create a basic external SIP trunk for your BYOC Premises configuration, you find that you need more control based on the SIP requirements from your carrier, see Configure advanced external trunk settings

If you need more information about any of the settings on the Create/Edit External Trunk page, see External trunk settings


  1. Click Admin.
  2. Under Telephony, click Trunks.
  3. Click the External Trunks tab.
  4. Click Create New.
  5. In External Trunk Name, enter a trunk name.
  6. From the Type list, select External SIP. (Not required if the Type field does not appear.)
  7. Confirm that the Trunk State switch is set to In-Service.
  8. Select the Protocol and Listen Port given to you by your SIP provider. 
  9. Under Outbound - SIP Servers or Proxies, enter the IP address for your SIP server or intermediate proxy in the Hostname or IP Address field. 
    Note: The trunk will automatically use the default inbound listen port . If you want to use different port, enter that number in the Port box.
  10. Click Plus .
    Note: IP addresses added to the SIP Servers or Proxies section automatically appear in the SIP Access Control Allow list.
  11. Leave Digest Authentication set to Disabled.
  12. Under Calling, specify the Caller ID and Caller Name for the trunk and then use the Prioritized Caller Selection to specify the location from which and order in which you want to display caller ID information to the call recipient.
    1. Leave the Availability switch set to Disabled.
    2. Leave the Registration switch set to Disabled.
    3. Under SIP Access Control:
      • Confirm that the Use Source Address switch is set to Yes.
      • Confirm that any IP addresses that were added to the SIP Servers or Proxies section appear in the Allow the Following Addresses list.
      • Leave the Always Deny the Following Addresses blank.
      • Leave the Allow All check box unselected.
    4. Click Save External Trunk.