--- title: How do I configure a Yeastar PRI Gateway with a Grandstream UCM PBX server? description: Grandstream, Yeastar, PRI, Gateway, Network, Digital Trunk, E1/T1,PRI-CPE, Switch type, Ports --- [Skip to content](https://help.voipsupply.com/migration/en/knowledge/how-do-i-configure-a-yeastar-pri-gateway-with-a-grandstream-ucm-pbx-server#main-content) English Show submenu for translations ![voipsupply.com\_logo450.jpg\]](https://help.voipsupply.com/hs-fs/hubfs/voipsupply.com_logo450.jpg?height=40&name=voipsupply.com_logo450.jpg) - [Shop](http://www.voipsupply.com/) - [Contact Us](https://www.voipsupply.com/contact-voipsupply) - [Blog](http://www.voipsupply.com/blog/voip-insider/) - [Support](https://www.voipsupply.com/getsupport) Open main navigation Close main navigation - [Shop](http://www.voipsupply.com/) - [Contact Us](https://www.voipsupply.com/contact-voipsupply) - [Blog](http://www.voipsupply.com/blog/voip-insider/) - [Support](https://www.voipsupply.com/getsupport) - English Show submenu for translations - [Contact us](https://www.voipsupply.com/contact-voipsupply) [Contact us](https://www.voipsupply.com/contact-voipsupply) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. 1. [Help Center](https://help.voipsupply.com/migration/en/knowledge?hsLang=en) 2. [Device / Network Configuration](https://help.voipsupply.com/migration/en/knowledge/device-network-configuration?hsLang=en) 3. [Yeastar PBX](https://help.voipsupply.com/migration/en/knowledge/device-network-configuration?hsLang=en#yeastar-pbx) # How do I configure a Yeastar PRI Gateway with a Grandstream UCM PBX server? Step 1: Configure the Yeastar PRI Gateway: - First, set up your physical ISDN PRI connection and establish the SIP relationship with the UCM. - Configure Digital Ports: Log into the Yeastar gateway web UI. - Navigate to Gateway \> Digital Trunk. - Edit your E1/T1 port and enter the specific signaling (usually PRI-CPE), switch type, and channel numbers provided by your telecom carrier. - Ensure the status light turns green, signifying a live link to the carrier. Create a VoIP Trunk: Navigate to Gateway \> VoIP Trunk and click Add Trunk. Trunk Type: Select Peer Trunk.Provider Name: Enter Grandstream\_UCM.Hostname/IP:  Enter the static local IP address of your Grandstream UCM.Port: 5060 (or the corresponding SIP port configured on your UCM). Step 2: Configure the Grandstream UCM: - Next, build the matching side of the peer trunk on the Grandstream system. - Create the Peer SIP Trunk: Log into the Grandstream UCM web GUI. Navigate to Extension/Trunk \> VoIP Trunks and click Create New SIP Trunk.Type: Select Peer SIP Trunk.Provider Name: - Enter Yeastar\_PRI.Host Name: Enter the static local IP address of your Yeastar PRI gateway.Verify Connectivity: Save and apply changes. - Navigate to the UCM Dashboard or Trunk Status to verify that the newly created SIP trunk shows an "Available" or "Registered" status. Step 3: Route Outbound Calls (UCM to Yeastar) to let Grandstream extensions place outgoing calls through the PRI lines, define how the UCM hands calls off to the gateway.UCM Outbound Route: On the Grandstream UCM, go to Extension/Trunk \> Outbound Routes and click Add.Calling Pattern: Enter your desired matching pattern (e.g., \_9X. if users dial 9 first, or \_X. for direct dialing). Main Trunk: Select the Yeastar\_PRI peer trunk you created in Step 2.Privilege Level: Ensure the extension permissions match this route's privilege level so users are permitted to dial out. Yeastar IP to Port Routing: Log back into the Yeastar gateway and navigate to Gateway \> Route Settings \> IP-\>Port (IP to Digital Route). Call Source: Select the VoIP Peer Trunk pointing to the UCM.Call Destination: Select your physical PRI Digital Trunk. Step 4: Route Inbound Calls (Yeastar to UCM)To send calls coming from the outside PSTN/PRI lines down into the Grandstream phone system. Yeastar Port to IP Routing: On the Yeastar gateway, navigate to Gateway \> Route Settings \> Port-\>IP (Digital to IP Route).Call Source:  Select your physical PRI Digital Trunk.Call Destination: Select the VoIP Peer Trunk pointing to the UCM.Hotline (Optional): If you want all incoming digital trunk calls to land on a specific UCM extension or IVR, you can input that target number here as a "Hotline".  Otherwise, leave it to pass the original DID numbers.UCM Inbound Route: On the Grandstream UCM, navigate to Extension/Trunk \> Inbound Routes.  Click Add.Trunk: Select Yeastar\_PRI.DID Pattern: If matching specific numbers, enter them here; otherwise, use \_X. to capture and route all incoming traffic. Default Destination: Direct the calls to an Extension, IVR, or Ring Group according to your system needs.Save and click Apply Changes on both appliances to activate your live calling pipeline - [Cloud Management Platforms](https://help.voipsupply.com/migration/en/knowledge/cloud-management-platforms?hsLang=en#main-content) - [Fanvil](https://help.voipsupply.com/migration/en/knowledge/cloud-management-platforms?hsLang=en#fanvil) - [SIP Paging Gateway](https://help.voipsupply.com/migration/en/knowledge/sip-paging-gateway?hsLang=en#main-content) - [Fanvil](https://help.voipsupply.com/migration/en/knowledge/sip-paging-gateway?hsLang=en#fanvil) - [Device Factory Resets](https://help.voipsupply.com/migration/en/knowledge/device-factory-resets?hsLang=en#main-content) - [Fanvil](https://help.voipsupply.com/migration/en/knowledge/device-factory-resets?hsLang=en#fanvil) - [SIP Register Configuration](https://help.voipsupply.com/migration/en/knowledge/sip-register-configuration?hsLang=en#main-content) - [Fanvil](https://help.voipsupply.com/migration/en/knowledge/sip-register-configuration?hsLang=en#fanvil) - [Provisioning Devices](https://help.voipsupply.com/migration/en/knowledge/provisioning-devices?hsLang=en#main-content) - [Grandstream GXW42XX / VoIP Gateway](https://help.voipsupply.com/migration/en/knowledge/provisioning-devices?hsLang=en#grandstream-gxw42xx-voip-gateway) - [Broadcast / Multicast](https://help.voipsupply.com/migration/en/knowledge/broadcast-multicast?hsLang=en#main-content) - [Fanvil](https://help.voipsupply.com/migration/en/knowledge/broadcast-multicast?hsLang=en#fanvil) - [Device / Network Configuration](https://help.voipsupply.com/migration/en/knowledge/device-network-configuration?hsLang=en#main-content) - [Fanvil](https://help.voipsupply.com/migration/en/knowledge/device-network-configuration?hsLang=en#fanvil) - [Grandstream](https://help.voipsupply.com/migration/en/knowledge/device-network-configuration?hsLang=en#grandstream) - [Yeastar PBX](https://help.voipsupply.com/migration/en/knowledge/device-network-configuration?hsLang=en#yeastar-pbx) - [Poly / HP](https://help.voipsupply.com/migration/en/knowledge/device-network-configuration?hsLang=en#poly-hp) - [Network Troubleshooting](https://help.voipsupply.com/migration/en/knowledge/network-troubleshooting?hsLang=en#main-content) - [Yeastar PBX](https://help.voipsupply.com/migration/en/knowledge/network-troubleshooting?hsLang=en#yeastar-pbx) - [Backup & Restore](https://help.voipsupply.com/migration/en/knowledge/backup-restore?hsLang=en#main-content) - [Yeastar Backup & Restore](https://help.voipsupply.com/migration/en/knowledge/backup-restore?hsLang=en#yeastar-backup-restore) - [PBX Licensing](https://help.voipsupply.com/migration/en/knowledge/pbx-licensing?hsLang=en#main-content) - [Switchvox PBX](https://help.voipsupply.com/migration/en/knowledge/pbx-licensing?hsLang=en#switchvox-pbx) - [Provisioning Services](https://help.voipsupply.com/migration/en/knowledge/provisioning-services?hsLang=en) VoIP Supply Help Center Copyright © 2026, VoIP Supply