When using Cisco IP Phones, you may face some problems that can only be solved by a factory reset of the phone. The procedure itself is ridiculously simple. Reset Cisco IP Phone 7900 series During the factory reset procedure, the following information will be erased: ...

Remember this mess with several tens of Cisco IP phones available on the market (not counting video endpoints)? There were: old-school 7900 series, intermediate 6900, 8900 and 9900 models, newly introduced 7800 and 8800 IP phones, finally some experiments like 3905, Android-based ...