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Resetting or Restarting the Cisco Unified IP Phone 7975

posted Oct 11, 2013, 8:50 AM by Leszek Pilat   [ updated Sep 12, 2014, 8:10 PM ]
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1.Performing a Basic Restart

Restart phone
From the Main screen, press Settings to displays the Settings menu, then press **#**.
Note This basic reset sequence also works from any other screen that does not accept user input. 

2.Performing a Factory Reset

Performing a Factory Reset
When you perform a factory reset of the Cisco Unified IP Phone, the following information is erased or reset to its default value:
-CTL file—Erased
-User configuration settings—Reset to default values
-Network configuration settings—Reset to default values
-Call histories—Erased
-Locale information—Reset to default values
-Phone application—Erased (phone recovers by loading the term75.default.loads file)
Before you perform a factory reset, ensure that the following conditions are met:
-The phone must be on a DHCP-enabled network.
-A valid TFTP server must be set in DCHP option 150 or option 66 on the DHCP server.
-The term75.default.loads file and the files specified in that file should be available on the TFTP server that is specified by the DHCP packet.

To perform a factory reset of a phone, perform the following steps:
Step 1 Unplug the power cable from the phone and then plug it back in.
The phone begins its power-up cycle.
Step 2 While the phone is powering up, and before the Speaker button flashes on and off, press and hold #.
Continue to hold # until each line button flashes on and off in sequence in orange.
Step 3 Release # and press 123456789*0#.
You can press a key twice in a row, but if you press the keys out of sequence, the factory reset will not take place.
After you press these keys, the line buttons on the phone flash orange and then green, and the phone goes through the factory reset process. This process can take several minutes.
Do not power down the phone until it completes the factory reset process, and the main screen displays.

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