You can use your own headphone to chat on telephone with this cable
Use PC Headset with most VOIP phones that have a RJ9/RJ10/RJ22 headset jack (Not compatible with RJ11)
Adapter cable with dual 3.5mm PC Headset jack to RJ9 Desk Phones Jack for Avaya, Cisco

Technical Details

Product Details

Product Dimensions

Package Dimensions
Width : 4.75 inch
Height : 0.12 inch
Length : 6.87 inch

Item Weight: 0.64 ounce (View shipping rates and policies)
Shipping Weight: 0.64 ounce (View shipping rates and policies)

ASIN : B01KVDIR9G