http://www.ciscoheadsetadapter.com
Do you need a headset for your Cisco IP phone?
Are you unable to find good one within your budget?
Answer is here - The Cisco Headset Adapter!
The Cisco Headset Adapter allows you to use any standard cell phone headset
with your Cisco IP phone.
Here are the benefits of using the Cisco Headset Adapter:
SAVINGS! Cheapest Plantronics headset for Cisco IP phone costs $70-75,
good headset will cost you over a hundred. At the same time good Plantronics
headset for cell phone costs $20-30. Thus, total costs for cell phone
headset with the Cisco Headset Adapter will $35-45.
FREEDOM OF A CHOICE! You can choose the cell phone headset you like -
monaural, binaural, in-the-ear, over-the-ear, even Bluetooth headset
(Bluetooth adapter required). You are not limited to one manufacturer.
SIMPLICITY OF USE! Installation is very simple - just connect the Cisco
Headset Adapter to the headset jack in the back of your Cisco IP phone, and
plug you headset into the adapter. No boxes on the table, no batteries, no
settings.
UNIVERSAL PLUG! Manufacturers like Plantronics have proprietary feature
called "Quick Disconnect." It allows you quickly disconnect your headset.
The keyword here is "proprietary". You are getting same function as a
standard feature.
MULTIPLE USES FOR THE HEADSET! You can share your headset between your
cell phone and Cisco IP phone.
Guaranteed to work with Cisco 7940, 7960, and 7970 phones. US patent
pending.
http://www.ciscoheadsetadapter.com 
NEW PRODUCT! The Headset Adapter for Cisco IP phones 
Linear Mode
