Cable for PC headsets 3.5mm jack, 8p8c modular RJ45 for Icom IC-706 IC-7000 etc. | eBay
Keendex Kx1777 RJ9 RJ10 RJ11 Male To 2x 3.5mm Female Plug Mic & Audio Adapter Cable 10cm Black 6220034561777 - Keendex International
OMTP audio adapter and headset microphone minijack 3.5mm - Cablematic
Amazon.com: HDTVhookup.com™ 3.5mm Headphone Jack to 3.5mm Audio Balun Extender Over Cat5 : Electronics
Rj11 3.5mm Headset Adapter | Female Rj11 3.5mm Male | Rj11 3 5mm Jack Adapter - Original - Aliexpress
Amazon.com: SHUHAN 3.5mm & 2.5mm Audio Cable CAT5 RJ45 Socket to 3.5mm 4 Pole Male Plug Audio Ethernet LAN Network Adapter, Total Length: About 13cm : Electronics