7945g can't use power supply of 7940

talk to CISCO on there official forum. real
start here
https://community.cisco.com/

why go anywhere else. as rules can be fluid , for sure
if security gets more tight every day.
talk to them , actual

Could be a bad hook switch on the phone if you plug a different phone in does it work as it should?

This process should work for you http://www.cisco.com/en/US/products/hw/phones/ps379/products_tech_note09186a0080094584.shtml

Cisco Telephone Power Brick

Use the professionals rather than "a comment".
Contact Cisco directly here: Cisco Technical Support IP Phone FAQ

According to Cisco, when initiating a factory reset procedure certain information from the IP phone is erased while other information is reset to the factory default value, as shown in the list below:


Information Erased:

• CTL File (Certificate Trust List)
• LSC File (Locally Significant Certificate)
• IP Phone Call History (Calls Received, Placed, Missed etc)
• Phone application

Information Reset to Default:

• User configuration settings (ring tone, screen brightness, sound levels etc)
• Network configuration settings

t is highly advisable to follow the firmware upgrade procedure in a non-working environment to ensure other phones are not affected (in case of an accidental reboot), and to avoid the freshly factory reset ip phones obtaining the working environment's settings.


Please use the link below and follow the instruction http://www.firewall.cx/downloads/cisco-tools-a-applications/cisco-ip-phone-a-ata-firmware-downloads.html

If you used the traditional keypress sequence where you hold down the * key, reboot the phone, and then press the keys in sequence, you may be stuck in a boot loop. You might need to connect your phone to a network if your phone is trying to reach a TFTP server to fetch a firmware or config file update. If you need a power supply, you might try CiscoPowerCube.com they sell a cross compatible version of the CP-PWR-CUBE3 which includes the cord.

what are you trying to connect this to? cme

How to set a Cisco IP phone to factory default Reset configuration of Cisco IP Phone (7910, 1911, 7940, 7941, 7960, 7961)

To set the Cisco IP phone to factory default completes the following steps: should be completed:

For 7940, 7941, 7960, 7961 phones:

1. Power up the phone (unplug power cable and plug in again and hold the # key.
2. Release # when lights start flashing.
3. Press 123456789*0#.
4. Press 1 to keep network configuration or 2 to lose the network configuration.

For 7906G and 7911G phones:
1. Power up the phone (unplug power cable and plug in again and hold the # key.
2. Release # when MWI starts flashing.
3. Press 3491672850*#.

Confirm if the Phone has power supply. and If it's connected to a POE switch confirm that it connects to the Switch port on the phone.

Give me your number, and i'll call you! Solved! =-D