I've been trying to factory reset some SPA50x phones, specifically the 504G but the old provider has locked out everything.
I need to reset about 50 phones for use with a new service. I've man in the middle'd their provisioning server, but the phone profiles are compiled with SPC.
I've found a reference to how the old provider created the compiled profiles, and I have recompiled a new profile overriding the Admin_Passwd in the config file, but the phone simply complained that the config file was corrupted.
The phone is configured for SIP, but I have tried connecting it to a UC540 to see what would happen. The phone is able to re provisioned against it, but I still can't reset it without the admin password. This was just for testing anyways, since I actually need the phones connected to Asterisk.
I am very close to considering opening the phone and looking for a jtag port or some other way to reset these phones. I have a single phone on my desk right now that I can play with. I am hoping to find a repeatable solution to this.
Any advice would be great.