On multiple new UCM systems including a 6301, and two 6308s at the latest firmware, with GRP 261X phones at firmware 22.214.171.124 we are having very bad response times when - picking up the handset to hearing audio, pressing the speaker button to hearing audio, pressing the menu button to seeing the menu on screen, dialing numbers very slowly updating on the display, and so on. I have tested this on multiple phones in multiple (local, not remote) locations. It seems that the phone goes to “sleep” after a short amount of time and then will respond very slowly. After it has woken up it is faster, but certainly not as fast as my old GRP phone on my UCM 6204. The web interface is also very laggy and many times just opens a blank page until it is reloaded a few times.
Myself and another tech have already opened tickets with Grandstream, so this post is to see if this is a common issue that other users are having. It seems like the firmware upgrade to make the phones unified and to use a new web UI is possibly part of the issue. I have not had this problem with the previous firmware.