Description This article describes the recommended settings in Grandstream IP Phones to avoid un-registration issues due to unstable network connectivity. Recommendations
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 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 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
Description You can select Key Mode in Grandstream High-end Color GXP21XX series IP Phone under the VMPK settings. This article describes the scenarios in different key modes. When the phone is in Line Mode If there is a line button only for Account 1, pressing an Account 2 key causes the Account 1 line key … 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
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 The Grandstream SIP Speaker GSC3516 is a SIP/Multicast Talk-Back Speaker that offers 2-way voice functionality with both a high-fidelity 15W HD speaker and 3 directional microphones and 1 omnidirectional auxiliary microphone that offers a 4.2-meter pickup distance. This article describes the maximum power of GSC3516 as 13.59W（48V DC), and the average power is 4.2W. This … Read more
Description Slowness in IP phones can be attributed to various factors. This article suggests the troubleshooting steps to address slowness and sluggish issues in Grandstream GRP2612 or GRP2613 IP Phones: 1. Disable CPE (TR-069) under System Settings 2. Disable ‘Send SIP Logs’ and ‘Auto Recovery from Abnormality’ under Maintenance > System Diagnostics > Syslog 3. … Read more
Description This article briefly describes the Security Settings parameter in Grandstream IP Phones GRP261x series. It is important for debugging when the phones are registered via TLS/SSL. ‘Validate Server Certificates‘ is mainly used for Web Interface or SSH access. ‘Check Domain Certificates‘ is to check a domain using the Trusted Domain Name List. ‘SSLKeyLogFile‘ is … Read more