Description This article describes how the Network Ethernet Settings in Grandstream FXO gateway only allow the following block of IP addresses, as stated in RFC1918. The RFC reserves the following ranges of IP addresses that cannot be routed on the Internet: The incorrect IP range or subnet mask will prompt you with a ‘Mask Mismatch’ warning or … Read more
Description This article describes the steps to configure the PSTN lines in the Hunting Group with HT8X1 and Grandstream IP PBX UCM63XX. We use HT841 in this case. Steps 1.Configure a Peer Trunk between UCM63XX and HT841 following the steps in the guide 2.Connect PSTN lines to FXO ports of HT841 using RJ11. We use … Read more
Description This article describes the recommended settings in Grandstream IP Phones to avoid un-registration issues due to unstable network connectivity. Recommendations Others
Description This article describes the error of Account Registration Failed when logging in to Grandstream Wave Mobile using the UCM Remote Connect address, but it works in Wave Desktop and Wave Web. The error occurs when an invalid certificate is uploaded. Try these 2. Go to UCM’s UI > PBX settings > SIP Settings > … Read more
Call Park Feature Call Parking is a feature that allows a person to put a call on hold on one phone and continue or pick up from another phone. It can be activated by pressing the programmable key on an IP Phone. It will transfer the call to an unused ‘Parking Lot’ extension. The callers who … Read more
Description This article describes the steps to configure Ring Simultaneously on the same extension range of Grandstream IP PBX UCM63XX and Analog PBX. Scenario I have an extension range (200-300) in Panasonic Analog PBX and Grandstream PBX UCM6301. They connect with a PRI Gateway GXW4501 through a SIP Peer Trunk and E1 cable. When someone … Read more
Description This article describes the instructions on how to upload 802.1x certificates in EAP-TLS mode with the Grandstream Android Video phone GXV3XXX series. Step 1: Navigate to Network Settings->Ethernet Settings->802.1X Mode > select EAP-TLS mode Step 2: Reboot the device after uploading certificates and it is filled with identity. Note: The users do not need … Read more
Description The Network Status indicating “NAT Type: UDP Blocked” means that the Grandstream IP Phone has detected that the SIP port is not properly port forwarded. Suggestions Note: STUN may not work with all routers, particularly those with Symmetric NAT enabled. References SIP ALG and why it should be disabled on most routers What is … Read more
Description This article explains the differences between Account Mode and Line Mode in the Grandstream High-end Color GXP21XX IP Phones, particularly regarding the Virtual Multi-Purpose Keys (VMPK) settings. When the phone is in Line Mode Dynamic Key Switching: If a line button is assigned only to Account 1, pressing the Account 2 key will dynamically … Read more