Video Invitation Failed with Mitel MiVoice 3300 System and Grandstream Android IP Video Phones GXV3XXX

Video Invitation Failed with Mitel MiVoice 3300 System and Grandstream Android IP Video Phones GXV3XXX

This article describes the video call establishment issue in Grandstream Android IP Video Phone GXV3XXX with Mitel MiVoice 3300. An error ‘Video Invitation failed’ will show during the call. This issue can be resolved by modifying the SIP Options and Signaling and Header Manipulation configurations under the Mitel system > SIP Device Capabilities. Please refer … Read more

HT8X1 – Subnet Mask Mismatch Network Ethernet Settings

Mask Mismatch when Setting Network in Grandstream FXO Gateway HT8X1

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

Hunting Group feature in Peer Trunk with Grandstream FXO Gateway HT8x1 and IP PBX UCM63XX

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

Account Registration Failed in Grandstream Wave Mobile with UCM Remote Connect Address

Account Registration Failed Grandstream Wave Mobile with UCM Remote Connect services

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

Call Park with Grandstream IP PBX and IP Phone

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

Ring Simultaneously on Grandstream IP PBX UCM & Panasonic Analog PBX’s Extensions

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

How to upload 802.1x certificates to Grandstream Video Phone GXV series

How to upload 802.1x certificates to Grandstream Video Phone GXV33XX series

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

[FAQs] Grandstream IP PBX UCM6XXX Deployment Scenario and Past Cases

Grandstream IP PBX UCM6XXX Deployment Scenario
The customer has an ISDN PRI number 5600300 with 30 channels, numbers from 5600300 to 5600329. They have multiple company headquarters located in one building and want to have one primary for 3 companies. Each company has a different IVR answering the call and a dedicated number for fax.  This can be done using the DID pattern ... Read more

Network Status NAT Type: UDP Blocked in Grandstream IP Phones

Grandstream IP Phone NAT Type UDP Blocked

Description The Network Status of NAT Type: UDP blocked indicates that the Grandstream IP Phone device detects that the SIP port is not port forwarded.  Suggestions Please note that STUN does not work with all the routers, especially with Symmetric NAT enabled, it is recommended to do manual port forwarding for the SIP and RTP … Read more