Plug your iPhone Earphone into a Standard 3-Conductor Jack
Amazon.com: VoiceJoy Standard 3.5mm Jack Smartphone Headset Adapter Cable Converter to RJ9 Plug for Cisco Unified Office Telephone 7970 7940 7941 7942 7971 etc : Electronics
Amazon.com: ienza 2.5mm Male 3-Pole to 3.5mm Female 4-Pole TRRS Headset Jack Adapter Compatible with Panasonic Cordless Phones to Headsets or Headphones with a 3.5mm TRRS Plug (Mic & Headphone) : Electronics
StarTech.com Headset Adapter - Office Depot
Point Source Audio ADP-4MxPH PSA Headset Adapter Cable ADP-4MXPH
Yealink EHS60 - wireless headset adapter for wireless headset, VoIP phone - EHS60 - Headset Accessories - CDW.com
USB-C Headphone Splitter/Dongle with Mic - Audio Cables and Adapters | StarTech.com
5-Pin to General Aviation Headset Adapter Cable – Rugged Radios
3.5 mm TRRS to Slim 3.5 mm TRRS - Headphone Adapter | Hosa Cables
Headset Adapter, Jack Headphone Splitter CTIA Headphone
CISCO Headset Adapter | PC Headset to CISCO Phone Adapter
DELOCK 65344: Headset Adapter 3,5mm 4pol - 2x 3,5mm 3pol at reichelt elektronik
Amazon.com: UGREEN Headphone Splitter 3.5mm 2 Female to 1 Male Mic and Audio Y Splitter TRRS Headset Adapter Cable Stereo Compatible with Laptop PS4 Xbox PC Phone Tablet Gaming : Electronics
SOLO-GA - General Aviation Headset USB Adapter - Flight Sounds Ltd
Headphone Mic Splitter, 3.5mm Headset Adapter (Microphone + Audio) 2 TRS Female to TRRS Male CTIA Stereo Jack Y Cable Compatible for Dual-Plug Gaming Headset to Phone, Laptop, PC - Walmart.com
Andrea Communications EDU-USB External USB Headset Adapter