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Cisco 7940 not upgrading firmware or resetting to factory setting properly. I have a multiple Cisco 7940Gs that I have changed to my Asterisk based PBX and they all upgrade to the latest firmware and download there config file from the TFTP server. However, I have two phones that will not load the firmware or config at all, all the other phones load but these two don't, they immediately load to the SIP application and attempt to register the old extension which is not valid any more. The wierd thing is that only these phones jump straight to loading SIP, they do not load the "Cisco Universal Application Loader" like the other phones but instead just load the SIP application. All the other phones do not do this and they are all on the same network. i have tried to rest the 2 non-working phones to factory settings but this does not work. I am not sure how to proceed.

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1 Answer

My Cisco IP Phone 7945G keeps rebooting after I did a factory reset. Is there a way to fix this?


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


Aug 28, 2012 | Cisco 7945G IP Phone

1 Answer

How can I clear / reset a Cisco IP Phone 7910


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*#.

Oct 28, 2010 | Cisco 7910 IP Phone

1 Answer

I need to replace a Cisco 7060 handset that has gone faulty, I can only get 7961 models, would this model work properly? or can the firmware of 7960 be able to support 7961 or 7962 ?


The handset piece is interchangable. The firmware is NOT. The handset is simply the piece with the speaker and mic in it that you hold in your hand.

Aug 25, 2010 | Cisco 7940 IP Phone

1 Answer

We are experiencing some NW problems with our Cisco 7940 hardphones. We have several installed and for some time now it seems that these hardphones just lose their default gateway configuration and stop...


I would check the firmware on the phones. Also, check that your switches are properly configured. Duplex settings do matter. If your using cisco switches; do a "show interface" and check for CRC errors etc.

Jun 25, 2010 | Cisco 7940 IP Phone

2 Answers

Can I use a CISCO IP 7941 phone, that has been on a company network, in my home? Should it just work by plugging in a telephone connection and using the appropriate power supply? Is there programming that...


Yes, there is programming which would need to be removed. However, you would need a cisco call manager($800) at home. Unless of course you have voip in your home. then you could just set it to DHCP I'm assuming and then it should just work!

Jan 14, 2010 | Cisco 7940 IP Phone

1 Answer

Converting Cisco 7940 IP Phone to SIP


Unlocking a Cisco 7940

Method 1:
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.

Method 2

Complete these steps:
  1. Press Settings.
  2. The Network Configuration lock symbol must be unlocked. If not, exit to the main window and press ** # again.
  3. Press 3 on the keypad (or scroll down) for Network Configuration.
  4. Press 33 on the keypad (or scroll down) to Erase Configuration.
  5. Press the Yes softkey.
  6. Press the Save softkey.
The phone will now be reset.

Also see this link
http://www.cisco.com/univercd/cc/td/...tain.htm#93250

May 18, 2008 | Cisco 7910 IP Phone

1 Answer

My client has Cisco 7940 IP phones and wants assistance with feature programming


This phone can be access through a menu/ setting buttons.

Useful link on how to navigate through the phone:
http://www.cisco.com/warp/public/779/largeent/avvid/products/7940/7940_topic3.htm
I think the main problem is to determine the intergrated router or Call manager configuration
You can also connect on switch and type:show cpd neighbor This will show the physical port connections

Nov 27, 2007 | Cisco 7940 IP Phone

1 Answer

IP 7920 & Asterisk


I believe I saw somewhere that the 7920 works best with the 4.02 version of firmware... only hitch is you can't get it unless you have a valid Cisco login with access to their voice stuff. You could see if your local partner could get it for you otherwise. Also, I think you need the cradle to upgrade the phone manually - otherwise you need a TFTP server set up and the proper keywords in the cnf.xml file. There is better info on voip-info.org about these sccp phones - god I wish they (Cisco) would release a SIP firmware for these things!

Nov 23, 2007 | Cisco 7920 IP Wireless Phone

1 Answer

My phone receive calls but it wont let me make a call


Sounds like a firewall or ACL.
while offhook, press the "?" 2 x, see if there the phone is sending packets or go to the network settings and get the IP Address.
You could try to reset the phone to factory.
http://cisco.com/en/US/products/hw/phones/ps379/products_tech_note09186a00800941bb.shtml

Nov 02, 2007 | Cisco 7940 IP Phone

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