Firmware for UCM6202/6204/6208/6510 is released as Beta



Dear Grandstream Customers,

Firmware for UCM6202/6204/6208/6510 is now released as Beta. The firmware and release notes can be downloaded from:

Please contact us should you have any issues. Thank you for your support for Grandstream products.

Technical Support
Grandstream Networks, Inc.



Can we upgrade directly to 23 or must be level by level ?


always level after level if you don’t want problems


There appears to be a problem with in that Voip trunk Caller ID name can no longer be changed. It is fixed at the admin login name for the UCM6202.

It will let you change it but then when you return after save changes its back as it was.


Clear cache. This is browser fill not UM.