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
Description This article suggests the parameters to resolve the issue of call disconnect after a few minutes in Grandstream IP Phones. You can set these under Account > SIP Settings: 1. Force Timer to Yes 2. Force INVITE to Yes 3. Enable UAC Specify Refresher to UAC 4. Enable UAS Specify Refresher to UAS
Description This article describes the additional settings that are missing in the Grandstream ATA HT814 & FXO Gateway GXW841 FXO and FXS Port Mapping official guide. HT814’s UI 1. Go to Advanced Settings > STUN Server: leave as blank 2. Go to Profile 1:
Description This article describes the issue of uploading the device’s XML config file to Grandstream Analog Gateway GXW42XX. When exporting and importing the XML config from one gateway to another, you may experience an error ‘Failed. Please try again.’ Workaround To solve this, remove <mac>xxx</mac> from the XML Config and re-upload it to the new … Read more
Description This article describes the designed behavior of hunting behavior in the Grandstream analog adaptor (ATA) HT8XX series. There are 2 Hunting Group types, “Linear” or “Circular” under the Profile page. The default type is Circular. The circular style will distribute the calls “round-robin”. If a call is assigned to line 1, the next call … Read more
Description The document below describes how to make calls using specific FXO ports in Grandstream analog gateway GXW410X peering with IP PBX UCM63XX series.
Description Setting up a NAS server with Grandstream IP PBX UCM63XX provides a powerful and versatile solution for business needs. It centralizes and stores the data, and provides redundancy and reliable systems. How it works
The priorities of ringtones are played as follows, from high to low in the Grandstream IP Phone GRP260X series：1. Distinctive Ringtone (Type B)2. Contact Ringtone (under Contacts > Local or Remote Phonebook)3. Group Ringtone4. Distinctive Ring Tone (Type A)5. Account Ringtone6. System Ringtone
Description No ‘ringback tone’ issue on outbound calls occurs when the PBX or UCM receives 183 Session Progress (with SDP) first and then 180 Ringing later from the SIP Service Provider (ITSP). It would be a 183 Session Progress message to play the ‘Early Media’ on the caller’s phone. Also, missing SDP in 183 Session … Read more