My red light wont go out on cisco 7940 phone, even when i have no messages

get a dial tone and dial 7091.

do the same with 7090 to turn the message light on.

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*#.

You would need either a call manager or call manager express to configure the phone and connect to the phone line.

Here are the instructions for configuring these units for 3cx

http://www.3cx.com/sip-phones/cisco-7940.html

http://www.3cx.com/sip-phones/polycom-soundpoint.html

Since the 3cx softphone worked well, I don't see why you couldn't configure each as for 3cx and make them work as well.

The handsets will eventually go bad. If it is every single handset that you have, the problem is with the system. But if the problem is only with a few of your phones, you might consider replacing the handsets. We at IdacomUSA.com have replacement Cisco handsets for sale at only $25. Hope this helps you out :)

1-800-903-9190

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

Try adding Cisco 7914 (time two) for additional (other) phone lines, or define caller group so phone call rings around.

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

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

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