Question about Computers & Internet
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Posted on Jan 02, 2017
Unlocking a Cisco 7940
1) Unplug the phone
2) Plug the phone back in while holding the # key
The phone will soon display “Reset key sequence detected”
3) After several lights flash press the following keys in order:
1 2 3 4 5 6 7 8 9 * 0 #
4) The phone will then ask you if you want to save the network configurations:
Save network cfg? 1=yes 2=no
5) The phone will soon display “Factory reset initiated” and will continue
through the boot up process.
If that process fails to work for some reason there
is a second method.
Complete these steps:
Also see this link
Posted on Nov 25, 2008
I have found this on the cisco site.
Posted on Jan 25, 2010
SOURCE: my cisco ip phone 7905
the reason for this would be that it is not getting it's config from the CallManager (or CME router).
The steps in a phone booting up something like this:
1) DHCP for IP Address, and Option 150 for TFTP Server
2) TFTP to address provided by DHCP Option 150
3) Get config file, a(an upgrade of firmware may occur at this point)
4) Connect to Call Manager/CME as specified in config file
First check DHCP server to see if it is allocating an address to the MAC address of the phone
Second confirm if DHCP is providing Option 150 and that is the IP Address of the TFTP Server (typically one of your Call Managers)
Third check that the phone is correctly configured on CCM/CME. A common error at this stage is that the phone is configured with the wrong model type.
Call back if you get to that stage and are still having problems.
Posted on Jan 06, 2011
SOURCE: my cisco ip phone 7960
You can try a couple of things:
Unplug the power cable from the phone, hold dows the # key, and then plug the power cable in again.
The phone begins its power up cycle. Release the # key after the Speaker button is no longer lit.
You should see the following message on the phone: "Reset key sequence detected"
Press 123456789*0# within 60 seconds after the Headset, Mute, and Speaker buttons begin to flash.
If you enter this key sequence correctly, the phone displays this prompt: Keep network cfg? 1 = yes 2 = no
In order to maintain the current network configuration settings for the phone when the phone resets, press 1. In order to reset the network configuration settings when the phone resets, press 2.
Or to perform a full reset: Press **#** to reset the Cisco IP Phone 7960
Posted on Mar 15, 2011
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