I am trying to connect my jabra 9450pro headset and they cannot hear me but I can hear them. Im hooking it to a cisco IP phone 7960

verify your connection to the Cisco phone and also that the headset port is turned on.

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

either the switch is partially shorted or the pin on your headet has a shorted wire in it somewhere..try a new headset first..

Do you have a power block for the phone or are you getting power from a POE switch via cat5 cable?
How do you know you purchased a working phone? When was the last time the phone worked properly?

Any other information you can supply about your VoIp setup would help us troubleshoot the power issue with your phone.

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

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*#.

There is, but these settings are setup in Call Manager, or Call Manager Express. I would see your systems admin to set the default priorities.

Then you need power adapter for Cisco 7960 IP phone ( -40V DC).
Cisco phones work best with Cisco, and sometimes ONLY Cisco switches.

One question which voice gateway you will use for your 7960 VoIP phone calls to go through ?
(AT&T probably supports only their IP Phones with special and usually hidden settings from end user)

You can solve this by connecting your phone inline.
On the back of the phone where the phone handset plugs into, plug one end of the jabra headset wire & connect other end to the 2nd position (marked by phone & handset). Now plug the handset wire from Ip phone to the 1st position (marked by handset) in the jabra headset. Now you are good to go.

When the phone rings lift the phone handset and answer it with your jabra headset. You can't use jabra with 7941 without lifting the handset on phone.

James, plug the phone cord that comes out of the back of the CS55 base into the handset port of the Cisco phone, not the headset port.  Then plug the coily cord from the cisco receiver into the front of the CS55.  Don't use the "Headset" button on your Cisco phone, just lift the receiver off.