Unified Communications

How do I connect two SIP Trunks to Grandstream UCM?

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Description In some countries, the providers of SIP trunks deliver a private IP for the routing of calls on their SIP trunks, in these cases, it is necessary to manage static routes to redirect outgoing calls on their private network or interface. In dual-mode, the UCM6XXX is able to handle a different network per individual port and a … Read more

How to Configure Self-Defined Time Zone in Grandstream Phones

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Description You may find the phone’s admin guide a little confusing when it comes to Self-Defined Time Zone setting under Date and Time Setting. This article shows you the steps to complete How to a. Navigate to the phone‘s web interface > Setting > Preferences > Date and Time b. Time zone: select Self-Defined Time … Read more

How to resolve ‘No dial plan rules matched’​ in Grandstream IP Phones

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Description When you usually try to make a call via a Feature Code (eg. *20*), you will see a message pop up ‘No dial plan rules matched’ on the phone, causing the call failure. Troubleshooting The reason is that the dial plan entries are not defined to allow # and * in the middle of … Read more

Error “LAN Port disconnected. Please connect LAN port to discover again.” in UCM’s Zero Config

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Issue Zero Config that is unable to auto-detect different subnets. Error “LAN port is disconnected. Please connect LAN port to discover again” pops up each time running the scan Scenario or System InfoSystem Info: UCM6510 1.0.20.43IP Range: UCM IP: 172.26.28.250 GAC2500: 192.168.20.101 Troubleshooting steps– UCM62XX can ping GAC2500 – GAC2500 can access UCM62XX. – Manual registration … Read more

How to recover the admin password for Grandstream IP PBX UCM

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How to recover the admin password for Grandstream IP PBX UCM

Description This article describes how to recover the admin password of UCM. When the user forgets the Web UI admin password, you can : a. click the ‘Forget Password‘ button (as shown in Figure 1) the password will be sent to the user binding Email (under Maintenance > User Management). You are encouraged to configure … Read more

Known Issues with Grandstream Softphone Wave Lite application

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Grandstream Wave Lite Known Issue

Description This article describes the known issues with the Grandstream Wave Lite application. There will be limited or zero development resources for this application. Known Issues 1. IPv6 Wave Lite Android/iOS application does not support IPv6-only networks under some mobile networks (e.g. T-Mobile), the registration will fail under the IPv6 network. 2. Run in Background … Read more

‘Answered Calls’ are shown under ‘No Answer’ in Grandstream IP PBX UCM6XXX’s CDR

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Description When filtering a ‘No Answer’ CDR report, the list shows ‘Answered Calls’ on the CDR page of Grandstream IP PBX UCM6XXX. Explanation This is the designed behavior. When the sub-entry or call legs meet the Filter conditions (either No Answer or Answered), it will be pre-viewed as the first entry in the CDR results.