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

can you explain me how is your phone connect to internet.
best on your Question its seems to me you cant hear a dial tone because of following one or more factors might apply

1. you must log into the Extension Mobility service
2. you must enter a client matter code (CMC) or forced authorization code (FAC) after dialing a number
3. your phone has time -of-day restrictions that prevent you from using some features during certain hours of the day

You should contact your network administrator.

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*#.

Hello,
Complete these steps:
1.On the Cisco IP Phone, press the Settings button.
2.Press **#
3.When the window displays Settings Unlocked, click the More softkey.
4.You now see the Erase softkey, which can be used in order to erase the configuration on the Cisco IP Phone.
I hope that this has been very helpful for you

If this solution will not helpfull for you that time pls send me a IP Phone details.

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.

Not really sure, but for the price youll pay to fix it, you might as well buy a replacement. check out usedcisco.com, they have cheap second hand hardware, fully warrantied.. and i think they ship internationally.

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.