Phone Configuration and Troubleshooting

Polycom reset & configuration
DO NOT do this unless you have specifically been advised to.  This will render your phone inoperable until the reconfiguration is completed.  This is NOT a ...
Tue, Sep 4, 2018 at 3:58 PM
Phone keypad is locked and the PIN is not known
If a user locks the phone via the keypad menu, there is no way to unlock it except to factory reset it.  You should try some obvious possible numbers such a...
Tue, Nov 27, 2018 at 3:11 PM
Account not registered or LAN/network error on screen
Symptoms:  On a late-model Grandstream phone the status light is red, you cannot make or receive calls, and the display says "Account not registered.&q...
Thu, Sep 2, 2021 at 10:46 AM
Call quality issues (sound breaks up)
Your phones require a reliable and consistent internet connection for calls.  If you often have calls where the sound breaks up or sounds bad, there is most...
Mon, Jun 14, 2021 at 10:58 AM
Manually upgrade firmware on a Grandstream GXP phone (current models)
DO NOT do this unless you have specifically been advised to.  This might render your phone inoperable.  This is NOT a normal basic troubleshooting step.  We...
Thu, Jun 13, 2019 at 2:57 PM
LAN cable or network not found error on screen
Symptoms:  The phone display says "LAN down" or "network not found" or similar messages. This indicates that the phone can't can...
Mon, Jun 1, 2020 at 5:11 PM
Factory reset and set up a Grandstream on 3CX
DO NOT do this unless you have specifically been advised to.  This will render your phone inoperable until the reconfiguration is completed.  This is NOT a ...
Mon, Jul 13, 2020 at 11:07 AM
Troubleshooting 3CX mobile app issues
First, reboot the phone, and run the app manually.  Make sure you can make calls, then test incoming calls. If the phone fails to ring for incoming call...
Mon, Mar 7, 2022 at 1:32 PM
Factory reset and set up a Grandstream on 3CX
Factory reset and set up a Yelling phone on 3CX DO NOT do this unless you have specifically been advised to.  This will render your phone inoperable...
Fri, Sep 9, 2022 at 1:10 PM