Issue Description User is unable to transfer calls from the call queue via Wave iOS Test steps: 1. Ext. 1008 (Wave iOS) is a member of...

Description We've always seen issue using GXW4104/4108 for not identifying caller ID on the incoming call. Here are some steps you may...

Description Beside resetting the phone via Web UI or reset pin on the device, you can also factory reset the phone via SSH command. How...

Understanding Grandstream UCM Syslog Modules

Issue GRP260X freezes and not responsive occasionally, even after firmware upgrade and factory reset. Cause The freezing issue is caused...

Issue A lot of times, the users have forgotten “Admin Password” on the phone's web access page and have no access to the Factory Reset...

General Settings Go to the gateway or phone's UI > Maintenance tab > Upgrade and Provisioning, make sure that: Allow DHCP Option 43 and...

Scenario: If you are using Grandstream UCM as LDAP Server, you may find that that the contact names are not showing on the phones when...

Issue Description Grandstream UCM returns status code -8 for certain actions such as getSystemStatus, addoutboundroute, listvoiptrunk...

Issue GXP16XX phones are stuck at 'Recovery Incomplete' or 'Firmware Initialising" upon boot up. Cause The error is caused by power...

Background Many users find it difficult to capture the Syslog from the phone or gateway devices when the issues are intermittent and...

If you are new to telephony networking and troubleshooting, this guide shows you step-by-step in setup and configuring the parameters to...

A lot of times, we have seen Grandstream video conferencing unit (GVC 32XX series) are stuck at booting up with the logo. Here are the...

Common Issues: Gateway is stuck at “Booting…” Web UI shows 'No Service Running' Recovery Mode 1. Keep the Ethernet cable connected 2....