We got a couple of these DP752 ip phones and wanted to set them up and ran into a two problems.
First they wont fall over to the voice lan, so we decided to try and upgrade the firmware to see if this fixes the problem, but we are stuck on 184.108.40.206 and just tells us “UP TO DATE” when trying to check for new firmware but as far as i can see theres 220.127.116.11 out as the newest release.
How in the hell do i upgrade these?
Things I’ve tried so far.
disabled dhcp option 43 / 6& on the firmware update page.
using my own http server
using firmware.grandstream.com url
tried rebooting after telling it to upgrade.
Any good advice?