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I am having a provisioning failure with our Grandstream 2604p. Firmware is 220.127.116.11 which show approved by zoom and provided by grandstream. I have tried the https url as well as the http url in the configuration guide. My DHCP is et to no and none, I see the phone downloading the file, but ultimately get a failed to download firmware... even though this is a configuration file and not firmware. I haven't been able to try then Web Interface option as I cannot find the SIP user ID or Authentication ID anywhere in the documents that is readable.
goto phones and devices, add device type grandstream, model grp2604 and assign to a user. goto assigned and select the grp2604p. at the bottom of the screen, click Actions and Provision. you will see sip user id and authentication. please see attached screen shots.
i was able to provision a grandstream grp 261x using phone web interface.
current f/w for grp 2604p is 18.104.22.168.
please also see:
Zoom has recently added Zero-Touch provisioning for some Grandstream desk phones including GRP 2604. please see 8/10/2022 update of Getting-started-with-provisioning-desk-phones. please also see a screen shot of screen to ADD Desk Phone.